How to: Auxiliary Battery Replace on a 2010 Mercedes ML350

[@howardosagie61]

Well done great job 👏 👍 😀 👌 🙌.

[@How2Helen]

Thank you for the kind words! -Rjeff H2H

[@robertclarke7411]

One of thr best videos on this matter

[@How2Helen]

Thank you for your kind words! -Helen

[@moimoimeme2219]

Hello . Je suis français, et j'ai un GL 420 CDI , Bravo pour les explications et job 😀

[@How2Helen]

Hello! I hope our video has helped you on your battery change. Thank you for watching! - Rjeff H2H

[@YingJwo]

Love the tissue paper technique to hold the nut in the socket. Genius! I’m going to have to start using that.

[@How2Helen]

And if you are eco-friendly, you can use a leaf! Lol! Use whatever is available on the spot, even a piece of newspaper. As long as you don’t forget to remove it from the battery area. We don’t want it starting a fire. Thank you for watching and subscribing! -Rjeff H2H

[@mustaphahammadi208]

Thanks for your well explained video

[@How2Helen]

We hope our video was able to help you. Thank you for watching! - Rjeff H2H

[@erikgillisostrom6109]

really clear video

[@How2Helen]

Thank you - Rjeff H2H

[@OttoByOgraffey]

Thanks. I fought long and hard to get the battery up and out. Not an easy task.

[@huenhuan2103]

Removing the main battery is a struggle because of the obvious limited space & the weight of that bad boy. Easier way is first to push main battery slightly towards back (after removing all the terminal cables of course) for front angle clearance. Then, slightly lift it up at an angle to pull out & immediately insert a long enough crowbar right underneath it to help slide & pull up the battery. Can also be used to slide the new one down when installing it. It'll make things go more smoothly.

[@How2Helen]

Great advise! Thank you for sharing that process! - Rjeff H2H

[@CarsWithLuisEnEspanol]

After you replaced secondary battery, and then start the car was the white battery light gone?

[@mjvexpressllc]

My wife has a 2020 GLB 250 are the batteries located in the same spot by chance, thanks in advance

[@How2Helen]

Hello. The 2019-2020 GLB 250 auxiliary battery is located inside/under the center console. Front base of the shifter lever. But I think you car is too young to have a bad aux battery. Check for blown fuses and/or wiring first. These batteries should last minimum of 6 years. Hope that helps. Thank you for watching! -Rjeff H2H

[@mjvexpressllc]

@@How2Helen thanks for reply! I’ll definitely check the fuses, car will not start due to bad battery definitely going to check when I get home

[@javediqbal-bd8sf]

Hey dear friend, your video is a very, very helpful and you make a steel by step so nice. I like your style easy way and my friend. I have a Mercedes-Benz ML350 4 Matic. I have an issue my radio come on first time when I start after go to Anote and system please if you know help me out I really really appreciate I’ll send you description how to display screen. Anti-theft protection activated. Please switch the ignition on and restart the system.

[@How2Helen]

Hello. From what you describe, unfortunately, only a dealer can unlock your radio. They have the dealer only scanner to use for the radio to make it work. Sorry I could not help- Rjeff H2H

[@juhdah2146]

Nice! Should both batteries be replaced at the same time?

[@How2Helen]

Hello. My opinion is just replace which one is bad. They operate independent from each other, so no sense in replacing if the other battery is still good. Hope that makes sense. Thank you for watching - Rjeff H2H

[@chrisc1623]

Did you run into any issues after disconnecting and reconnecting both battery beyond radio codes. Anything you have to reset or re-program after re-installation with a OBD reader or computer. Or is it just plug-in play like most cars. I know for the S-class you have to re-calibrate some stuff.

[@How2Helen]

Hello. I was asked just to replace the aux battery, and the owner never mentioned anything he needed reprogrammed/recalibrated afterwards. Sorry, I could not give you a better answer. Thanks-Rjeff H2H

[@alfredonunez7596]

I undo the front passenger seat four screws and push it forward. It gives you unrestricted access to the battery(ies) bay.

[@aimeehardin1299]

How do I know which screws that is to undo? And what tool do I need to be able to do this (not a mechanic! Lol)

[@jinglesandchanucey1]

Do you lose the codes (radio) when you replace the main battery or the auxiliary battery, is there a way to save the codes. I don’t have the codes and the local dealer won’t work with me. Thank you

[@How2Helen]

Hello. On our experience, we did not lose the radio codes. As you saw on the video, we had to remove the main battery, to get to the auxiliary battery. But I cannot guarantee if will have the same luck as we did. Sorry if that wasn’t much of a help. All I can do is wish you luck. I hope you have the same results as we did. Keep us posted! Thank you for watching and subscribing! -Rjeff H2H

[@steverichardson6920]

I have just replaced the main battery and used many colourful words during the process, I was concerned about loosing coding so connected a battery charger to the pos and neg terminals under the bonnet without issues.

[@How2Helen]

@@steverichardson6920 I know how you feel. They really make it a challenge just to change a battery. Maybe they did it that way so that whenever you do change your battery, you feel like you have made a big achievement and feel good about yourself. Lol. Thank you for watching and subscribing! - Rjeff H2H

[@OttoByOgraffey]

​@@steverichardson6920 *losing

[@toodledoemeu8]

How long does the original auxiliary battery suppose to last?

[@How2Helen]

Hello. This was the original battery on the vehicle. And we replaced it in 2023. So from the owner’s experience, it lasted 13 years. But we don’t know if that is the average lifespan as this is the only one I have worked on so far. Thank you for watching! -Rjeff

[@pedrotking6554]

😮so i want to ask Mercedes why the heck did they put the battery under the front seat in such a difficult way. A car with such a big boot and big engine space they couldn't find anywhere better. Come on.

[@How2Helen]

The answer is “German Engineering, no further explanation needed”. Lol. Thank you for watching! -Rjeff H2H

[@car77777]

badazz philipino mechanic thanks bro

[@How2Helen]

Lol. Thanks for the compliment bro, you just made my day! Thank you for watching! 👍- Rjeff H2H

[@electric8668]

How can you tell it needed to be replaced?

[@How2Helen]

Hello. The battery light on the dash will be illuminated if yours need to be replaced, as seen on the first 4 seconds on the video. Is the battery light on you dash on? Let me know. Thank you for watching and subscribing -Rjeff H2H

[@Mach141]

I guess if the passenger power seat motor breaks your just shit out of luck

[@otutu2000]

Hi, Which city are you located?

[@How2Helen]

Hello. Queens in New York -Rjeff H2H

[@otutu2000]

@@How2Helen Do you have a shop there? I live in Lodi, NJ and have a 2006 ML500 that I want you to check for me.

[@How2Helen]

@@otutu2000 Hello! Sorry, I don't have a shop, and I'm not a certified mechanic. I just happen to help my coworkers with their car issues. If you want, let me know what issue you are having and I can try to help you diagnose the issue. I am really just passionate about cars. Let me know if I can help! - Rjeff H2H