Mercedes w211 battery voltage check. 2+. Has the auxilliary battery ever been renewed? One of its main purposes is as a SHORT TERM backup for the SBC SYSTEM should the overall main battery/alternator fail to Jan 18, 2009 · Hi! I have a 6 year old W211 220 cdi, and I have some problems with the battery. So if you replaced the main battery and were wondering why you are getting the Battery/Alternator Visit Workshop message then check this battery as well. Turn on the headlights and HVAC blower Car regulates voltage to 14. Suspect the battery, going to check with a voltmeter. The voltage should typically be within the range specified by the manufacturer (often around 12 volts). g. The battery control module detects if the main battery's voltage becomes low and signals the auxiliary battery to supply power. The document outlines specific steps for measuring voltage and current and offers safety Jun 20, 2018 · Measured static and idle battery voltage at posts and monitored on instrument cluster under load. The bettery as had a good life if it is 8 years old . 2V when the engine is running and 11. How to check the batteries and how to Sep 19, 2021 · The message continues to come on for a short time 1-2km. Nov 4, 2017 · Hi. Is this a failed relay? Nov 29, 2002 · W211 Dual Battery System Function An auxiliary battery supplies electrical energy for a limited time if the systems battery voltage is low. 9K subscribers 67 Apr 14, 2023 · Just bought a 2 year old E class diesel estate 2. Four months ago i had a Battery Alternator Visit Workshop message,i bought a brand new Bosch alternator and it the message dissappeared. Jan 14, 2024 · Use a Digital Multimeter to check the voltage supply at the control unit connector. Before you start the car after it was sitting for a few hours or overnight, grab a multimeter and check the voltage at the secondary and the main battery. if a battery is poor you will sometimes see dramatic results! Nov 13, 2024 · How can I check the battery voltage and alternator condition via cluster on a Mercedes-Benz? The following procedure is simple to check whether your Mercedes-Benz alternator is charging or if the battery is discharged. I've tried putting it in temp display on first click of the key, then pressing the reset button 3 times. FCP EURO has the FIAMM original for about $120, lifetime warranty. 1 Volts engine off and when charging engine running 14 Volts. Oct 7, 2011 · Please post what you know. 9v when charged and the voltage reading is 14. Mar 10, 2014 · Hi, Appreciate any help? I have recently bought a W211 E320D 2004. I scanned and there are few codes. Using an inbuilt feature of bluetooth OBD scanner (measuring the system voltage), I have discovered Aug 24, 2015 · I assumed it was the aux battery and replaced that a month ago, but it made no difference. Dec 27, 2007 · Trying to diagnose a stray ESP light that is no longer a problem. Additionally, we will reveal the hidden menu that provides Apr 12, 2007 · As others have said, that is too low. The battery in your C-Class or C-Class AMG makes electricity through the constantly-occurring chemical reactions inside of it. Links are provided below; if you click on any of them, you will be taken to Amazon to read reviews and check Customer: I have dead battery problems with my 2005 E-320 CDI. Aug 30, 2010 · I've seen several post's regarding low battery voltage. Choose from a stunning inventory of pre-owned luxury cars and mainstream cars at Mercedes-Benz of Henderson! When you've made your choice, schedule a test drive near Enterprise! Research the Mercedes-Benz lineup, including the automaker's current and past models. 5 volts Oct 20, 2024 · Struggling with a draining battery in your Mercedes? This article uncovers the common culprits behind battery issues, from faulty alternators to leftover accessories. This step-by-step informational guide shows how to check the voltage on a Mercedes via the instrument cluster. Oct 27, 2010 · I BOUGHT AN PREOWNED 2005 MB E500 SPORT 2 YEARS AGO & ALMOST FROM THE BEGINNING, I WOULD INTERMITTENTLY GET THE FOLLOWING WARNING: "LOW BATTERY, CONVENIENCE FUNCTIONS TEMPORARILY UNAVAILABLE", THE LIGHTS AND DASH BOARD WOULD FLICKER & THE RADIO & INTERNAL LIGHTS WOULD BE DISABLED. Has removed two battery for charging / How to remove battery charging W211, W219 Amazing Road TV 230K subscribers 1. Edit: And one condition of charging is that main voltage (or voltage that BCM N82 sees) should be over 13. 10 hours ago · Moving up the ladder, we get to the “Top-End” cars, where Mercedes-Benz is readying a barrage of new releases. 6A draw on the battery. It is done on a 2005 mercedes c classe, but it should work on May 25, 2014 · E-Class (W211) - Hidden Tricks and Tips List? - Has anyone compiled a list of those little tips and tricks like how to display the battery voltage, oil level, or clear the learned shift points? The Wiki would have been a great place, but apparently that never took off, and no one has any interest in bringing it to The on-board electrical system in models 211 and 219 is managed by the battery control unit (N82). In this short tutorial I will show you how to check battery voltage and alternator charging on your Mercedes w211. Apr 14, 2018 · The document outlines specific steps for measuring voltage and current and offers safety precautions to avoid risks related to battery handling. W211 automobile pdf manual download. However, like any finely-tuned machine, issues can arise, particularly with components like the voltage regulator. Here are some batteries we found on Amazon. 2: 14. Could it be the BSG module? Dec 5, 2011 · Check voltage directly at the battery terminals observing the voltage drop between the alternator and battery. With so many electronic components, things go wrong and could end up draining one of the batteries. 2003 MERCEDES W211 Electrical Problems!! Battery Control Module (BCM) Easy FIX!! ALEX Garage 5. I would change the battery, as the voltage drop doesn't seem right, but I'm just worried it might still be serviceable and bad voltage regulator or alternator from oil leak is causing me the battery light as its dropping from 14. May 5, 2014 · Hi i have a 52 plate e240 w211. Yes, with the engine running you should be seeing 13-13. Does this apply? Feb 29, 2020 · Car starts fine, reliable and all electrics in car working fine despite issue of battery warning light. com for everything around the E-Class Benz * In this part of 'W211 tips & tricks' I'll show you how to check the hidden b May 20, 2023 · Since problem started after jump start replace alternator. I checked both batteries and they are 11. skin Aug 23, 2016 · Welcome to the W211 E- Class! Try the electronics-battery section. The Mercedes W211 is aging and starts to show some messages which probably all owners will see. /No control module defective (P1999. Jul 20, 2023 · I am getting the dreaded red battery alarm with Visit Workshop message on our W211 2005 estate and a 9071 diagnostic code. Jun 18, 2015 · Mercedes-Benz E-Class and E-Class AMG: Why is My Battery Not Charging? The Mercedes-Benz E-Class has one main battery in the trunk and an auxiliary battery in the engine bay. Jul 10, 2017 · Do not trust the voltage readings through the a/c controller, apart from a cursory indication to show if the battery is charging or not. He had arrived home from work and removed the ignition key but the car carried on running. If you replaced the main battery and were wondering why you are getting the Battery/Alternator Visit Workshop message, check this battery as well. Basic H-K (factory) sound system. 05 after 5/10mins, which Aug 2, 2015 · Hi All. My wife's w211 320cdi has started to bring on the convenience functions temporarily unavailable on the dashboard over the last few weeks. Mercedes Battery Drain Overnight This video explores the mystery behind the common issue of Mercedes battery draining overnight. If I take the negative cable off, the battery holds a charge indefinitely. Mercedes Benz Secret / Hidden Menu Turn off ESP Get voltage reading Measure engine oil level Works on W209 2004 -2009 CLK320 CLK500 C CLASS W203 2001-2007 C230 C320 C240 C280 C300 W211 2004 – 2009 E C CLASS E320 E350 E500 Battery Drain Does your Mercedes-Benz battery slowly drain? Is the battery dead every morning? Does the Mercedes-Benz battery die when you have the car parked overnight or leave it parked for a few days? This step-by-step guide explains how to troubleshoot the problem, covers the basics of battery drain issues, and identifies the most common trouble spots. mercedes-e-class. it is very easy and simple procedure and i Quick guide on how to check the battery voltage on a 2005 Mercedes E320 (W211). This is possible without removing the alternator. Replaced the boot battery with a new one, with the engine running voltage at the battery shows over 12v but the voltage drops with the engine running. Whilst sitting in my drive, learning all the new shiny buttons and updating the maps etc, I got a message "12V Battery See owners manual" and an email from Mercedes Me saying "the starter battery charge status of the vehicle KR21CXC is Nov 5, 2021 · In this video, we will show you how to check the battery voltage and access the Assyst service menu of your Mercedes-Benz E-Class W211. Seems lots of E class owners forget or don't know about this second battery. It also references tools required for the procedures and provides modification notes and operation steps for the vehicle's electrical system. 4 volts. Main battery 14. 12. The auxiliary battery serves as a backup for the main battery. 9096, 9044, 9027, 930E, 9116, 9123. The 9071 code says Feb 8, 2013 · This might come in handy for some people: Mercedes Fault Codes Fault Code Fault Description Area B1000 HRA Headlamp range adjustment: The supply voltage of the control unit is too low (Undervoltage) Body B1004 LCP Lower Control Panel: Control unit does not match vehicle Download Mercedes Benz E Class W211 How To Check Battery Voltage Assyst Service Menu Hidden Menu Sanistra Errands in mp3 music format or mp4 video format for your device only in tubidy. The problem I am having is with battery voltage fluctuation. 5 with engine stopped. A car that will not start typically occurs at the most inconvenient time, and can leave you feeling down as well as dejected. 2 volts before starting the car. Of course, this could be a faulty battery too. It drops under 13 volts without AC, Nav or lights on under moderate acceleration. So far I have tried three other battery control modules and all I'm getting at the battery is 12. Check those points for corrosion free connection. Mar 29, 2012 · Sounds like your battery is not getting a charge (or getting a very insufficient one), either because the alternator is not putting out enough juice or because the charge is being interrupted/impeded. If you have less than 12. Sep 1, 2015 · Mercedes-Benz E-Class and E-Class AMG: How to Replace Main and Auxiliary Batteries The Mercedes-Benz E-Class uses two batteries in its design. We explore how this design marks a major shift in the brand's strategy for its electric vehicles. Star identifies battery Dec 11, 2008 · 11. No joy. Please assist to resolve it. After load full, autocharging is stopped. Nov 9, 2011 · It has a brand new alternator and a new battery. 5 volts at either one, you know your problem. Five models are set to debut in 2026, with another five slated for 2027. The alternator and battery control relay were both replaced by my local specialist in 2018 and I fitted new main and auxiliary batteries last year. I erased them through autel but they returned back. Note: The voltage at the battery should be above 13. v Auxiliary battery 12. This is a precautionary measure to reduce drain on a battery that has a low voltage, and includes disabling things like heated seats and rear window until the voltage has increased above a certain threshold. They have a European direct fit replacement battery. com’s team of experts. Battery voltage on the front starting unit is 13. :) A friend called to my house the other evening with his 2004 W211 E320CDI. I checked the battery voltage of both batteries, engine running. You can go with the OEM Mercedes-Benz Auxiliary battery, or you could go with a more cost-effective alternative that meets the specifications. You either have a faulty battery, charging issues or a parasitic drain - the voltage alone doesn’t give the full picture. With practical diagnostic steps and preventive tips, you'll be equipped to maintain your vehicle's performance Mar 21, 2025 · When it comes to your Mercedes, you expect luxury, performance, and reliability. If its more than 4 years old I'd just replace the main battery. This is a common problem with the E-Class. This is what I have done to-date without success: (All tests were done with the car "asleep") Removed Quick check of your battery and alternator voltage from dashboard Disclaimer: The information provided in this video is for informational and educational purposes only and should not be considered Aug 24, 2015 · I assumed it was the aux battery and replaced that a month ago, but it made no difference. 0 volts to 13. Dec 18, 2018 · Probably not, You need a DVM, CHECK the voltage with the engine off, right across the AUX battery TERMINALS. 8v is low voltage. […] May 6, 2024 · Auxiliary battery malfunction Mercedes? Learn the causes, diagnostic steps, and how to fix or replace the auxiliary battery . 0V Immediately after driving, voltage decays to Mar 11, 2025 · Learn how to charge your Mercedes auxiliary battery safely with this step-by-step guide. Discover our award-winning luxury vehicles. Nov 23, 2009 · NOTE: you can have 12 V and the car still have a bad battery. They are given 3 years life some last well above that . The Battery Control Module N82 in the trunk monitors the voltage for these two batteries. 3v on a fast idle. It is mostly driven short distances, 2-5 miles with one monthly 400 mile trip. A solution found inside reacts with metal plates that are stacked in rows. Cover the negative battery terminal with insulating material to prevent it from coming in accidental contact with the battery. Also, this guide can help determine if the alternator is bad. 23 hours ago · The all-electric Mercedes-Benz EQ GLC is set to debut with a bold, new grille. Pointers, to another thread, or other pointers welcome. May 19, 2015 · This article applies to the Mercedes-Benz C-Class and C-Class AMG (2007-2014). If the engine is on, you should turn it off and let it rest for at least 5 minutes so that its electric charge stabilizes. Dec 8, 2024 · Intermittent Electronic Faults and Battery Voltage Issues Sometimes, the issue with your Mercedes key not working in the ignition isn’t about the key or ignition system. Some were designed for motorcycles, but can also be an auxiliary battery for your Mercedes-Benz. This little device plays a crucial role in maintaining the electrical system’s health, ensuring that your battery gets the right amount of charge while preventing the alternator from overworking. If the battery shows less than 12v with engine off but shows 14+v with engine running, the battery is bad. Every few months the batteries die. Oct 21, 2020 · Relay gets feed from main battery G1 via pre-fuse box F32. I have changed the regulator on a W211 E500 4matic. Should be about 12. Voltage should be within 13. May 9, 2005 · Hi all can anyone please tell me where exact location of auxiliary battery relay and the battery control module is and how to check these please, as I am getting red battery warning. We discuss the most common causes and provide easy solutions to fix Nov 7, 2021 · Hi, I have W211 2003 and have red battery alert on dashboard from quite time. Alternator is connected to the starter to F32 engine compartment side to F32 interior side to cable that runs to battery positive. However, if I leave the battery connected and everything turned off, the battery will drain down to about 3 volts within 2 days. Easy and cheap fix may be changing the volt regulator. Battery and Charging System Test Perform a load test on the vehicle’s battery to ensure it is maintaining charge and delivering appropriate voltage. 5 volts d/c. Innovative concepts, exceptional collaborations, background stories. whilst driving the other day i had a message displayed in red in the instrument cluster with a battery sign saying visit workshop. instagram. Measure the battery voltage at the charging points under the hood with a well calibrated multimeter. Learn how environmental factors and electrical faults play a role, and discover early warning signs of trouble. The last few days I have accessed the service menu before starting the car, and find the battery voltage to be anywhere from 12. Everything described indicates battery failure. We hope you find the Mercedes-Benz Service Dyno Mode | Secret Menu guides helpful. 9 volts. 6) and then tested with Apr 18, 2011 · My W211 has a battery drain issue and goes flat in a day or two. 1 volts. This procedure does not work on many 2014 and newer models. Apr 7, 2015 · To check for a current draw, put an ammeter on it and see how much current it's drawing. Charging is the easiest to eliminate. The N82 functions in two Jan 24, 2024 · Figure 4 The battery is located on the right side of the trunk. Before you start the car, after sitting for a few hours or overnight, grab a multimeter and check the voltage at the secondary and main batteries. Oct 1, 2021 · Hi, I have a 2005 E500 wagon that has been giving me battery issues. Should be around 14volts. 3 doesn't mean the battery is bad. in the past 3 months I have changed 1. Discover the current vehicle models from Mercedes-Benz: Passenger vehicles, vans, trucks and buses. Don't get stranded somewhere because you tried to squeeze an extra month out of an old battery. By watching this video, Mercedes-Benz owners can save money on dealership repairs and diagnose any electrical issues affecting their vehicle's battery and charging system for optimal vehicle Subscribed 112 23K views 3 years ago #w212 #w210 #w211amg HOW TO CHECK BATTERY VOLTAGE & ALTERNATOR /MERCEDES BENZ W211 more Nov 13, 2023 · How can I check the battery voltage of my Mercedes-Benz using my Instrument Cluster? By following the procedures below, learn to check your battery voltage using your instrument cluster. An ammeter has been connected on the 10A setting and there is a current draw of 0. I tested the voltage at both batteries with the engine off (showed 12. Feb 16, 2025 · Top 10 Best Mercedes Repair Shop in Enterprise, NV - February 2025 - Yelp - G & G Autohaus, MVR Auto Repair, Passion Auto Repair, Auto Dynamic Services, Eurotek Tuning, USA Auto Service, German Motors, A+ Automotive, Benztek Performance, Strictly European Research before you buy or lease a new Mercedes vehicle with expert ratings, in-depth reviews, and competitor comparisons of 2017-2025 models. Jul 13, 2015 · This article applies to the Mercedes-Benz E-Class and E-Class AMG w211 (2002-2009). Mercedes-Benz combines luxury with performance across the full line of models including luxury sedans, SUVs, coupes, roadsters, convertibles & more. 5+volts minimum. For quite a while my 2003 W211 E270 CDI has been intermittently showing me the Battery Protection warning. Jul 1, 2018 · Hello everyone, I have been following this forum for couple of years, but now I have actually signed up and this is my first post. OTHER THAN Feb 18, 2020 · So, I have had a parasitic battery drain problem in the e500 wagon/estate. Measure this across the View and Download Mercedes-Benz W211 manual online. :crybaby2: I replaced my battery with one from Carquest. Aug 14, 2011 · E-Class (W211) - Battery Control Module - Can it cause battery drain?? - I suspect that my battery control module (BCM) is bad, though I don't know how exactly to confirm it. 183) P20B8 B6/2 (camshaft Hall sensor,left cylinder bank) (P0340) Apr 24, 2012 · I bought a 2005 C230 Kompressor and i love the car. What would the minimum voltage be for an auto battery - at what battery voltage will the electronics begin to malfunction and cause problems/false indications? Aug 24, 2023 · IZ GAZAZE: How to check Mercedes benz W212 battery voltage from inside Selo kod Beograda 12. Right now both batteries are WAY under Oct 19, 2018 · nope, aux battery is isolated from main circuit via isolation relay, and relay is closed (battery charged) only if system detects low voltage right after engine start. Discover the best chargers and maintenance tips. BATTERY VISIT WORKSHOP Warning Light on Mercedes (SOLVED!) As an Amazon Affiliate, I earn from qualifying purchases *Shop Amazon for Car Parts & Accessories Jun 2, 2016 · Evening folks, I'm hoping for some help if possible. What minimum voltage should the battery show after say 1-2 days non-use? Car is a CLK55 AMG. How to use a multimeter to check the status of your Mercedes Benz‘s battery Get the car ready: To check the voltage of the battery, the engine of your Mercedes Benzmust always be turned off. The voltage at the battery with the engine running is good and the battery charges correctly. Start with fuse 23 more times than not the front passenger-seat control module is the culprit. View the entire line of Mercedes-Benz luxury sedans, coupes, SUVs, and sports cars organized by class and style. This doesn’t work for my Mercedes; what can I do? Try any of the other two (2) procedures above. Jan 8, 2025 · 2003 W211 sedan, pretty much a stripper except for heated seats and steering wheel. When I drive relatively normally with lighter acceleration, it stays above 14- even with AC, Headlamps, Nav and Radio. Usually only for a few minutes Nov 6, 2019 · If you are getting the convenience features message often, check the voltage of your aux battery under the pollen filter. Browse Mercedes-Benz vehicle reviews, videos and news from Cars. The data is presented in tables specifying millivolt readings corresponding to current in milliamps for various amp ratings across mini, standard, and cartridge fuses. Got this annoying battery alarm coming middle of the running… Dec 14, 2010 · Voltage Drop Across a Fuse Chart PDF A chart that provides detailed voltage drop measurements across different types of fuses. When measuring voltage at the battery with engine running shows <13volts. Recently fixed my red battery light issue, well the Feb 17, 2016 · This is my personal experience with my Mercedes Benz W211 -2005 battery warning error. You see the voltage go down when the engine is started. I have ran through about 4 batteries in the 3 years that I've had the car and that seems way too high. Relay fault is quite common though, I suggest you to check it. Check that the voltage with all consumables off and engine running around 1500 rpm is around 14. Its obvious that the SBC system is flagging up certain low voltages - the reasons for this can simply be faulty earth connections or far more complex problems. The battery control module will monitor the battery and manage the energy available on the two batteries. Struggling with my '08 Mercedes W211 E-Class battery charge issue. AL 0789X. In addition, check for closed-circuit voltage drop at fuses (interior fuse box located at driver side dash) using a multimeter to identify any source of battery drain if present. It includes images and technical diagrams to aid in the identification and connection of various components such as ground cables and the battery control module. 0 e220d. Mar 14, 2025 · Explore facts, owner feedback, and recall information about Mercedes Benz alternator problems to keep your vehicle running smoothly. 9v I thought the auxiliary battery would be the same voltage. So you should get same voltage reading no matter engine is running or not. Always check the voltage of your charging system under load. Time for diagnosis. 5 V, with the engine running, otherwise there may be a contact problem in the wiring between the alternator and the battery. You try to start your Mercedes-Benz Mercedes Benz Secret / Hidden Menu Turn off ESP Get voltage reading Measure engine oil level Works on W209 2004 -2009 CLK320 CLK500 C CLASS W203 2001-2007 C230 C320 C240 C280 C300 W211 2004 – 2009 E C CLASS E320 E350 E500 Battery Drain Does your Mercedes-Benz battery slowly drain? Is the battery dead every morning? Does the Mercedes-Benz battery die when you have the car parked overnight or leave it parked for a few days? This step-by-step guide explains how to troubleshoot the problem, covers the basics of battery drain issues, and identifies the most common trouble spots. Alternator? BCM? Battery? Oct 30, 2017 · Any garage will check the battery for you, and fit a new one if need be . I have recently purchased another E/Class 320CDI Avantgarde! For the last week a notification keeps Coming up, saying, Battery Protection System, currently unavailable, and I can't find out in the Handbook anything about this! Added to this, after a lengthy journey last night, I went to go Aug 29, 2018 · However even with battery voltage good, Sbc battery voltage good and a good steady charge, if I have the radio on and/or the climate control after a short while the battery warning light comes up, convience functions disabled, then they come back on then back off etc etc. IF the voltage drops below 10 V your battery is loosing reserve capacity. Replaced both batteries & checked alternator, but error persists. 5v, then start vehicle, immediately check voltage should be 14. I took the battery out, and the place gave me a new one. In most cases, this is due to the Battery Control Module (BCM) not being reset. How to check the #battery level on your #mercedes #w211 #s211 #car📸 add me on IG: https://www. I went out to start the car on saturday, and the battery was at 2. If its on the way out it can give that message as well as the main battery. As soon as it starts, voltage jumps to around 14. 58K subscribers Subscribe Sep 13, 2023 · Learn about the 'Auxiliary Battery Malfunction' in your Mercedes-Benz. 5/12. 2K Jun 21, 2015 · I have a 2003 e320 cdi and can't get the dash to display the voltage reading. Be inspired. To load, have the engine running at idle. i have had both the main and auxilary battery checked by the AA, who say that they are fine and all Feb 11, 2010 · All Im currently working on a W211 220cdi, the battery symbol and battery protection is displayed on the dash. Dual Battery System. My kid discovered the load issue for me. The problem originally started with a "Conventional Functions Temporarily Unavailable" message around June this year (2021). When reinserting the key all the correct clicks and Whirring sounds were made but you Jun 16, 2013 · Alternator Repair Help Needed Please!!! I started up my w211 yesterday and the display in the gauge cluster is red and says "visit workshop" with a picture of a battery. Also tried it on the cars speed dash reading. I took the car to Oreily's Auto parts to check the battery, and their test revealed that the voltage regulator is going bad Mercedes W211. this is coming on intermittently. consumer shutoff). Mar 2, 2014 · P20B7 Increased idle speed due to SBC low-voltage:Check current and voltage on vehicle. This video is about the RED Battery Visit Workshop message. It's an AGM A short video on how to check the condition of your Mercedes car battery Apr 9, 2014 · Can anyone with 2006 onward W211 320CDI's please check their car battery voltage so that i know if mine is showing as normal? If you move your instrument panel to Temprature>turn key once where SRS light ones on, then press Reset button 3 times it should beep once and should show Voltage. 4V to 12V. Discover its causes and how to fix it with my comprehensive guide. With headlights and rear screen on it should be above 14 volts. Pelican offers a full line of batteries to get you started and keep you on your way. This is what I have done to-date without success: (All tests were done with the car "asleep") Removed Quick check of your battery and alternator voltage from dashboard Disclaimer: The information provided in this video is for informational and educational purposes only and should not be considered Nov 13, 2023 · You can check your car battery voltage and turn off ESP, VIN, and alternator conditions. 3 volts. (maybe it is simply too old) First, 2 weeks ago it wrote, that it will Jul 9, 2019 · Thank you for the quick response Battery voltage on the rear consumer unit is 12. For a/c controller readings, mine reads 13. This has happened 3 times in 1 1/2 years beginning at 85,000 miles. Check what voltage you see on F32. Firstly, please let me apologize for starting another thread about battery drain, I know it has been done to death but it is driving me mad. The batteries are new'ish and the main battery is around 12. The Nov 26, 2009 · Check to see that connections to both batteries are fine. Now just as my car was indicating service B in 3 days time,the Battery alternator visit workshop appeared Mercedes E-Class W210, W211 ESP light If you have the ESP light on your E-Class, one thing you may want to check is the brake light switch. 2v. 2V (14. Check the pic in Post#4. When the reactions occur, electrons move about, creating the electrical energy the engine needs to start. 8-14. Oct 17, 2018 · How to check battery voltage & alternator/ Mercedes Benz W211 Albano Lika 309 subscribers 33K views 6 years ago How to check the voltage output of your Mercedes alternator along with the overall health of your Mercedes battery. Aux battery ( genuine mercedes) B. If Nov 6, 2022 · When the alternator can no longer charge the battery, you may park your vehicle and not be able to start it. You may want to Apr 20, 2024 · I'm trying to diagnose an inconsistent battery drain issue on my 2004 E500 4Matic wagon. Jan 18, 2018 · Best way to check is leave battery disconnected or out of car for 1 day and check voltage, if its too low you need to replace it, but I think check the alternator first because below 12V while engine is running doesnt sound right. Even when I use the cluster voltage reading, it’s showing steady. It has the red warning on the dash re brakes, and after reading this forum realise it is related to the SBC. You must check the voltage when cranking. I drive the car on monday, and up until then, everything was just fine. See my channel for more Mercedes-Benz W211 how-to's, acceleration, top speed, and much more! …more Jan 31, 2010 · malcolm's test is a good way to go, i often use this - just watch the voltage drop with all lights on. I have to drive 60 miles for a qualified Mercedes mechanic and it is problematic. The dreaded battery warning light always leaves us not knowing if its the In this video I show you how to access the secret Mercedes menu to check your car batteries voltage and to explain how you can use this information to determ This video is on how to access the secret menu on a mercedes and check the voltage of your car. It uses the measured current, voltage and temperature values to evaluate the state of the battery and initiates measures to stabilize the on-board electrical system if necessary (e. The only part left to replace would be the auxiliary battery Mercedes-Benz E-Class (2003-2009) W211 - Charging System & Battery (Batteries, Jump Starter, Distilled Water, & more) Batteries All batteries have a limited life. Had to remove the alternator on the E500 because of the tight space. When the car goes to "sleep" there is still a 1. It has been checked for voltage drain and battery problems. Jan 13, 2017 · Good evening ladies and gentlemen. . Sep 1, 2015 · Check battery control unit PDF A document that provides detailed instructions for checking the battery control unit in a specific vehicle model. I plugged in my Autel test scanner and it came up with a code C249E, undervoltage at SBC (not the message *Visit http://www. Diagnose the problem here. You try to start your Mercedes-Benz If you own a Mercedes-Benz W211 and have recently replaced your battery, you may experience issues with your car’s electrical system. Main battery (genuine Mercedes) 2. 5V. Figure 5 Starting at the negative terminal, loosen the 10mm fastener and pull the battery cable off from the battery terminal. After monitoring the issue since late December 2023, I've noticed the following: While driving, instrument cluster volt meter reads between 13. 3 measured), this feels like too low for fully charging an AGM battery, especially now when temperature is fairly low at 10C / 50F. At least on my E430 4matic. Feb 14, 2024 · Some time ago my W211 started to complain about disabled comfort functions after a few days of not being driven. When the energy is used quickly, it will disable “convenience functions” by switching off several electronic functions (consumers) in your car. 7 is a battery that's fully charged at 70 degrees and it's the no load voltage. com/taboncars/👉 add me on FB ht Before you start the car after it was sitting for a few hours or overnight, grab a multimeter and check the voltage at the secondary and the main battery. hcr sjgkk srebb nuxz ugdnuj ohoolyl gjcsjyg hech vhib fbpskgy