Mercedes Auxiliary Battery Change

[@debbieaesop2423]

Absolutely fantastic, thank you so much. My aux battery has been dead for a while and I'm only just thinking about doing it. I've ordered the battery and it should arrive in a week and with your help now it will be so much easier - thanks again - LOVE AND RESPECT FROM AUSTRALIA

[@lawrencebaisley7297]

Worked perfect. I really loved the detailed description of the step by step (even things like moving up the seat, leave driver door open, remove negative battery cable first, etc...[all the tips, hints, and clues, even the socket sizes]) THANK YOU SIR!

[@MrSahlensguy]

Just did this. A telescoping magnet really helped with the nuts and metal plate on the removal and reinstall. Great tip to move the seat all the way back to flip the carpet all the way forward. Easier job than I expected.

[@eschrader]

Worked great. I had to take a flat head to the old small battery terminal and bend it 180 degrees to clear the cage. Installed the new one facing outside you have (genius). Cleared my 2008 white battery light (without the text for maintenance).

[@wyattbelton2993]

My dude I'm by far Not a mechanic BUT THANKS TO YOU I just replaced my battery in my 2007 gl 450...U ARE SOOO SOLID & SPOT ON WITH DIRECTION...THANK YOU! PLEASE show us how to replace the front headlight housing...THANKS AGAIN!!!

[@umitcakici449]

Today you made my day; brown cable was loose, so the battery sign showed up. Only thing I had to do was connect the small brown wire! Now all ok. Thank you for the clear video and greetings from Amsterdam, The Netherlands!

[@iRepairAutos]

Awesome!!!!!

[@Leo70780]

Is the carpet all ready cut under the seat for easier access . Great Video

[@havilisimeki8887]

Hi great video, I’m interested in rear parking lamp , one is working the other is not and I checked all the bulbs and they are all good. I have a Mercedes Benz R350L 2006. How would I go about getting the lamp to work again?

[@kiwidadintheusa9334]

Thanks for making such a good instructional video! Much appreciated!

[@diamondstar1200]

Between that guy's voice and the organ music I feel like I'm at a Mortuary.

[@iRepairAutos]

Thanks!

[@debbieaesop2423]

Not sure if you monitor these comments as I know you have a lot of helpful videos going on but my GL320's battery goes flat if I leave it in the garage for more than a week. is this normal? PS. Just found out that my rear power outlet is hard wired in as it has a rear dash cam that monitors 24/7..........would this be the problem? Thanks again and more LOVE AND RESPECT FROM AUSTRALIA

[@jackneuman5917]

Followed your video and was easy to do. Without your video I would never have been able to figure it out. Thanks!

[@iRepairAutos]

Glad you were able to do this!

[@super8524]

Question is if you disconnect your main battery to chance auxiliary battery do you lose any save memory on you audio or navigation or any other equipment or do we have any other problem on any electronic device.

[@kehindeadeyemi6267]

Very informational . I just ordered an auxillary battery for my 2006 ml500 and i will try and install myself using this video. Meanwhile, how do you tilt the steering on the 2006 ml 500? Never did since i bought it 8 yrs ago. is it electronic? If manual, am i missing something?

[@kenmoon5685]

I used the Amazon Aux battery replacement link you shared; the Amazon link advises me that that part does not fit my 2007 ML350?

[@TheRutt1962]

First of all, you have very helpful videos! 🙂 Can the auxiliary battery cause the radio/back-up camera display not to come on? I have a 2014 ML350 4Matic and all the fuses associated with the radio are good. I am not getting any sound or display at all. I also disconnected and reconnected the main battery, but it's still not working. PLEASE HELP!!!

[@edhorn958]

Good job, you are very good at showing the correct way to do things

[@MrCuckoobox]

Great Vid. Thumbs Up!....Looks like you should replace both batteries at the same time if they are near end of life. Just FYI, if you are putting back the old "main" battery, you should clean all the acid residue off - soap and water. You can see light acid film on the top of the battery. Believe it or not, that can cause a drain on the battery because it is a "short". It will shorten the life of the battery. It is small, but over time it is a battery killer. You can also see a small amount of rust on your battery tray from acid leaks.......neutralize and clean. If you have time reseal with paint or rust sealant such as Loctite Extend Rust Neutralizer, 1381192. Using an "Acid Neutralizing" Battery Mat is helpful as well to preventing the rust from happening by adsorbing the acid. You can find them on Amazon. They are harder find in the larger sizes for the big batteries used by a lot of the luxury vehicles.

[@iRepairAutos]

all good points! Thanks for taking the time to comment on the video. Your points will definitely help the next person watching.

[@kellywood5782]

you have a lot of very helpful videos, really appreciate it

[@DanielYouTube72]

I have a 2013 ML 350. I purchased a new aux battery. Why not just recharge the battery instead of replacing? Can i recharge the aux battery with a smart charger? Or is it better to replace instead of recharge? Thanks

[@iRepairAutos]

The car charges it... however the aux battery only has so much life in it and eventually doesn't hold the charge. Replacing is the only option.

[@DanielYouTube72]

@@iRepairAutos thanks brother

[@tomtom4633]

Great video, very informative! Hopefully replacing this on my customers car will rectify the stuck in P, there are a few more faults with the car which may also be associated with this auxiallry battery.

[@happysawfish]

Great video. Thanks. For 2009 GL320 diesel, getting an error when trying to start (it will not start) that says something to the effect of vehicle not in park, in red letters. Then says "Don't forget your key!" Wondering if low battery in key fob can cause no start, or if it's the small battery - or both. It did this before and would not let me shift gears. I discon battery for 20-20 minutes, it started normally. But all this fun weirdness seemed to occur right after I hooked up a cheap scanner to the OBD2 and tried to erase CEL codes. Immediately thereafter the car would not start and displayed the same or similar messages. What do you think?

[@richiericcardo317]

I have a mercedes ml300 2009 make. Was sitting unused for a while at mercedes garage. They tell me they replaced main battery but when I eventually picked it up the auxiliary battery warning came up. After an hour or so drive ABS,EBV,ESP unavailable showed on dash. I parked it and tried to drive it the other day but has difficulty in changing gears I think it's in a limp mode. Does changing both batteries help me?

[@EDGARHERNANDEZ-fh4pz]

Thank you very much. I have a question 🙋🏻‍♂️: my ac in my ml350 it’s not cooling wheel , a test to see if it needs gas, but the ac gas it’s fine . . I have to replace the auxiliary batterie because is bad. And also the radiator is leaking very little . Do you know if one of this reasons maybe the problem with the AC??? What I Should do?? Thanks

[@johnjacoby5657]

Great Video , Should be same location for 2010 ml 350?? I have done my main battery twice and never noticed the small auxiliary battery which I'm going to change since it's 11 Years old..Thanks JJ

[@blacdadi2023]

This video is extremely helpful. Thanks a lot. But I have a problem with my sound system which is exactly like this very one on your vehicle. The issue is, I can't connect my phone because it keeps saying "Phone Not Available". I have tried everything but nothing works. It seems Bluetooth facility didn't come with the sound system. Any other ideas? Thanks.

[@adesanyasawyerr9133]

Nice video.... I had this same white battery sign on my dash board and my radio is talking out. I guess it’s cause of the battery. I changed it and the battery sign is still on the dash board. Could there be something else causing the white battery sign to remain on the dash board?

[@marcbovaird2388]

Great Video! And never knew about the battery breather tube so important to let poisonous gases from battery escape out of the vehicle. THANKS!!!!

[@AB-sy9tf]

Excellent video and very helpful. Wow, MB knows how to make things complicated don't they?

[@iRepairAutos]

Yes they sure do.

[@AB-sy9tf]

One other thing...How can either the auxiliary battery or main battery be removed if the main battery is dead? Is there a way to move the front passenger seat while unpowered?

[@iRepairAutos]

You will need to jump start the vehicle and keep it running to move the seat. Once the seat is moved etc. Turn off the vehicle and follow the steps in the video to zero out the car.

[@andyroid5028]

*I heard a rumor that in one of those remote tribes' language, the word 'Mercedes' translates to 'needlessly'... & the word 'Benz' translates to 'over-engineered'.* It seems MB has defaulted to the act of (needlessly) 're-creating the wheel'... but evidently, the wheel is now being re-created in the most complicated of ways possible. : ( And it's all in the name of increased 'post sale' profit... and this is continually happening, even in spite of the *HUGE* amount of inconvenience being realized by MANY of their customers in the form of time consuming & expensive repairs. And as a (planned) consequence, the increased costs in labor/parts often times effectively creates a deterrent to budget-conscious owners desiring to perform their own repairs to their beloved MB vehicles. And you can count me as one of those owners. And again, due to the many models of MB cars that require more time, effort & money to fix the now bewildering complexity of often (normally) simple maintenance/repairs found on most other 'standard vehicles' (that aren't branded a Mercedes Benz)... many loyal owners are forced to forgo the DIY process & pay the *premium* prices being commanded for genuine MB parts & labor (performed by MB dealership service departments). It's just ridiculous. I think MB translates quite simply to... The Money Pit. And to be clear, I own a 2001 'money pit'... & I'm finally realizing that... the longer I own it, the more the car reveals (through unavoidable repairs/maintenance) that the overly complex ways in which MB designed & implemented many things... that these particular parts/systems, etc could have (and should have) EASILY been made... well... simpler. What's pretty disheartening to me is that when I was a young lad, I always thought that it would be a great day in my life when I could finally say that I'm a proud owner of a Mercedes Benz. For many years, I thought that to myself. And yes, when that day finally happened about 5 or so years ago, I definitely WAS as proud as I thought I would be. But years later, I've come to realize that way too much money... as well as many (needless) long hours have been spent on keeping my MB in 'top shape'. And again, I blame MB for these 'systemic issues'. And finally, as I end my long & winding rant, I'm realizing that all of this time/money spent has made me much more of a salty/bitter owner toward MB. And honestly, it's made me more sad (as opposed to being mad) than anything else. And I say 'sad' because I honestly feel the 'old Mercedes way of doing business' is not only gone... but I also feel that it's likely gone FOREVER. : ( Sorry for the long rant.

[@kenmoon5685]

Best video on battery changing I have seen!! One question: can I use a trickle charger on battery-using engine compartment posts-? Thank you,

[@mikerphone7039]

Hi 👋,,, I'm having issues with my 2001 mercedes slk 320 electrical system.... Latest issue is the screen wash pump won't work , I've checked pump is ok ,, question is , is there a relay for it anywhere or anything else that would stop it working 🤔 , eg the k40 board ..... any help would be much appreciated 🙏 👍

[@tokoossrdc4692]

Thanks bro for you top videos . Did you ever faced an ML320 w164 empty battry after 5 - 6 hours and diagnostic check didn't connect ? We tried all normal ways ... new battery , alternator ....

[@worldpeace5853]

How long would the auxiliary battery last on an avg? Is it ok to replace it with OEM Duracell 1.3ah 12v? Do you change the main and auxiliary battery at the same time to be safe?

[@edgaraleman1668]

Hi! I'm having the same issue thanks to your video I notice where it was located the battery, I test the battery out the little out and it said 12v could it be that the battery even though it said that it's still have the voltage,do I need to change it or check other part?

[@NkosanaMofu-x6f]

Fantastic thank. But I need to change the auxiliary battery on my R Class and it's right under the driver's foot and next to the main battery under the seat

[@MatthewsDentalAssoc]

I have a 2012 ML 63. I found the battery in right rear fender. I can't get the battery out of the holder after taking out all the nuts. Any ideas?

[@theadventuresofbellaandjos6435]

Hi i i have a 2008 meecedes E350 AMG I have a battery warning light on the dash, my regular battery is brand new and my alternator is good, i was looking for the auxiliar battery buth i cant find it any idea where it could be thanks in advance

[@ianyoung6829]

Hi Sir always enjoy your videos i have an issue with my 2007 ML350, I am seeing the following message on the dash in red " Drive to workshop without changing gears " any ideas what going on with my vehicle your help is greatly appreciated

[@iRepairAutos]

Your transmission is experiencing some sort of failure. It could be in limp mode as well. This is a safety mode that prevents the transmission from shifting into different gears in an attempt to prevent further damage and get you home. Have it checked immediately.

[@ianyoung6829]

Hi Mr iRepair thanks for your prompt reply, Should i try and do a transmission reset or could it be the ISM Module going bad

[@jcstarbwoi8794]

I’ve had thesame issue just changed the Auxiliary battery the message is gone but one issue my radio on screen display is not coming on. Could you please help?

[@buddygallo4061]

Great video thank you. I have a Mercedes ml350 2008. I need to change both batteries like you showed. Your saying I don’t need an external power source or anything to save the on board systems when I unhook the battery if the key is off and the door is open right?

[@iRepairAutos]

That is correct.

[@buddygallo4061]

Thank you. Your video was a great help and I changed the battery as you showed. I’m still having a problem with it not wanting to shift into higher gears. I can drive about 30 mph. Would you have any ideas? Also could you recommend a good code scanner tool? I have a 2008 Mercedes ml350 all wheel drive. I’m newly subscribed to you channel and I love it. Thanks

[@iRepairAutos]

It sounds like your vehicle's transmission might be in limp mode. I recommend the icarsoft scanners. They are brand specific and available for the Mercedes. Low voltages and dead batteries have a way of messing with these transmissions. You may need to do a transmission reset . I have a video on that.

[@FriseGroomingTimisoara]

Hello sir I have a problem with my mercedes ml 320....its stiil blockbustere the navigatioon...it goes but I can not go to orders only from the steering wheel...the auxiliary battery is not changed...it may be from the battery????

[@akujude]

If the back up battery is removed at that point in time does it affect the car memory?

[@prosay]

Thank you for your excellent video. While I won't be doing the repairs myself, it gives me a better understanding of what is going on.

[@iRepairAutos]

Glad the video is keeping you in the know. Mechanics can't pull anything on you when doing this job.

[@chilandrina0725]

You are by far the most thorough repair guy on KZbin :) I had white battery icon for a while (about 4 months, barely drive car (maybe once a week). Had trouble starting my car one time…. Turned over, wouldn’t start. I let it sit for about 15 mins then started. Just a few days ago, car wouldn’t start. Turned over, but no start. Wouldn’t start with a jump either. Eventually, when I turned key it just clicked. Auto guy says my battery is now dead. However when we have the jumper cables on, it turns over (no start)…. Hope that made sense. Anyway-ANY idea what it might me? Could Aux Battery cause a no start? I never got a Red Battery warning light. Is my alternator bad? Just had starter replaced 5 months ago. Im so confused. (I have both new main and aux battery) … want to replace these before I get it towed but I’d like to know your opinion.

[@rosetmoet8797]

J

[@karterjohansen5788]

This happened to me too, no point in getting it towed if this happens. You may have to replace the main battery, but you definitely have to replace the auxiliary battery, and you have to remove the main battery to change the auxiliary batter, so it’s easy to do them both at the same time. I know it’s been a while and surely it’s been fixed, but just know next time you get the white battery symbol to replace the auxiliary before the main battery gets damaged again.

[@Sanhiriyan]

You said something about electronic status zero before changing the battery. So basically take out the push button start as well, AC off and keep the driver side door open? Where do I see the status as zero?

[@charjan7608]

Very thorough video. Appreciated. Last person to change my battery, left off the battery protection cover and vent cover and they cant find either.

[@iRepairAutos]

Thanks! Sorry to hear that those parts are missing. You can find them at the dealership and or some of those auction sites. Good luck.

[@margaritacalzada1522]

Would it be the same process for jump start or recharge the main battery of a 2008 diesel ml320 Mercedes?

[@danielbaker4820]

Would the auxiliary battery stop car starting I've got. Mercedes a class In it wont turn over I've powered starter up a. It runs (Pulled off cap of relay) But won't start unless u power up the. Igniter wire I checked wires on relay 12v on one positive main wire 3volts on live that powers switch for relay I'm assuming the battery powers up Sam units an alike So stopping it starting Will test will meter tomorro

[@stephaniecarrico6982]

Is this where you would find the aux battery for a c320 as well? battery light came on replaced big battery and then a few days later the light came back on so maybe the aux battery needs to be changed?

[@robbie3304]

Very good video , I always wondered where the auxiliary battery was hiding , now I know, thank you,

[@shelia7223]

What year is this? I have 2010 where would the auxiliary battery be located?

[@princetamakloe1600]

Great video! I've got a 2015 c300. any idea where I can locate my auxiliary battery? I've heard its in the trunk several times but I've removed all carpets there and still can't seem to figure out where it is. Thanks in advance

[@tssandhu7027]

check at the driver side dashboard on the side

[@edwardwillis3170]

I have a 2011 ML350, this video is dead on for the battery change, works for main battery also. Also did not lose the codes, per the instructions. HOWEVER if you are changing the Auxiliary battery for the first time, the bracket that maintains the auxiliary battery has to be removed and that is a pain in the arse. The tab only works if you have reversed the battery position so the leads are toward the inside the vehicle rather than toward the outside.

[@alexidominguez9997]

Mi auto ml 350 2011 me salió código de mal funcionamiento batería auxiliar. Si la cambio resuelvo el problema?

[@mauricemoore8472]

Hello, i have a 2012 GL450 with keyless start, should i be concerned with the system loosing memory as well. Should i try the all systems off and the door open method?

[@iRepairAutos]

You should zero out the car to avoid losing memory settings etc.

[@ambrosethomas1536]

Thanks for your response. Ok then, I recently changed the battery and all the preset were still operational,for example, all the windows and the moonroof opening up when holding the unlock button on the fob keypad for a few seconds. That did not change. I did look for one but did not find one.

[@btyme12]

do you have to reset anything when replace aux battery

[@Engineerboy100]

Good job, nice video, it sounded like I could hear your power steering pump going out in the back ground, you might want to check your fluid level on that. I gave you a thumbs up on this one.

[@iRepairAutos]

I appreciate the comments and the thumbs up. The power steering pump is noisy - fluids are good. (Probably will change it out before it dies). That's a good observation!

[@hungvuong8100]

I did the air filter changed on my 2007 ML350. When I put back the cover on and the metal cliff at the back which I pulled forward to hold the cover and felt off. How do I put it back in. I tried to hook it back on but some how it is too high. Can you help?

[@maharajahkumar]

Hey brother, great lesson. My brother got a used 2009 ML320 today and we towed home. It did start at first with a boost and we let it run for about 45 min and I did noticed it's saying "Auxiliary Battery needs repair" I wasn't sure what that mean. Now I turned off and try boosting it up forever but it will not start at all. Plus I have the window down and I can't put it up. So, how can I move the passenger seat forward and backward? Please help me out. Thanks.

[@iRepairAutos]

Sounds like the main battery is totally dead. I would jump start the vehicle and move the seat as needed to gain access. If the main battery is dying/dead it will also trigger the Auxiliary Battery needs repair as well. You need to take care of the main battery issue and while you're in there might as well change the auxiliary one too. Good luck!

[@maharajahkumar]

Thanks Bro, Yes I did jump started again and it worked now. But I think I am just going to change the Auxiliary Battery for now and will see. Thanks again.

[@taniaharrison6936]

Hello, Red battery light and red BREAK light comes on episodicly on dash cluster. Alternator and main battery has been replaced. Could this be a aux battery problem? PLEASE HELP ME!!! I have 07 ML 500

[@iRepairAutos]

No. The aux battery warning is a white light. For the Break light check your brake pad wear sensors, I have a video here kzbin.info/www/bejne/eJOtiHZ4l6-An8k about that. Also check your brake fluid level. Your battery and alternator connections may need looking at. Also check the pully/belt that is connected to your alternator.

[@remuslamare]

can you pls tell me the part number for the vent port that is locate above the main betterie ! Thx

[@yuberalpha3060]

Muchas gracias por el video, tengo un problema no puedo desplazar del todo mi asiento del copiloto automatico...por que es? Gracias

[@danoaks11]

Can you show this procedure where the auxillary battery is inside the cabin, under the glove compartment, like on Mercedes GLA 250?

[@MAGATonyG]

Great video. I will do this tomorrow. Thanks a lot

[@user-kk6qe5tn5r]

Will it make sense to try to bring the old aux battery back to life? It currently has a little over 5V. It was the factory battery that’s been in the car for 6 years. Thanks

[@iRepairAutos]

I would replace it. Especially if you're replacing the main battery. It's too much of a pain to put off replacing it.

[@user-kk6qe5tn5r]

@@iRepairAutosI already replaced it with the new one. I was just wondering if I can recharge the old one or I should just recycle it since it’s been in the car for 6 years. Thx

[@thefakepotato2719]

Hi to help I have Mercedes Benz C LA 250. And is not starting And every time I put the keys All the light I hope you can help me Thank you

[@iRepairAutos]

Is it cranking?

[@LeslieEdusei]

Please teach me how to replace the auxiliarybatteryon my 2020 Mercedes GLB 250 ,thank you

[@siridezoysa2631]

Please can you tell me where is Auxiliary battery located in a Mercedes E220 Blutec 2015 Model

[@NE_Patriots50]

I broke my shifter while car was in drive than I park the car and it went back to park and now can't shift into D or Reverse. Anything I need to do or reset? Thanks!!

[@davidsountris6201]

I have been searching your channel and others looking for help to diagnose my 2005 E500 4Matic Cruise Control issue. My problem is that at exactly 50 MPH or higher, cruise will not engage, below that speed it works fine which is terrible because anything below 55 or more is often stop and go traffic. I am reluctant to think it is a speed, abs or other sensor because it works up to 49 MPH. Once I try to accelerate using the Cruise stem and reach the magic 50 MPH it shuts off. Any thoughts are welcome. The Curmudgeon Man.

[@iRepairAutos]

Hmmmm. Do you have an icarsoft scanner. It will tell us exactly what dtc error codes your cruise control system is throwing.

[@christinab2942]

Thank you for helping others with an excellent video 🙌🏻

[@shilafletcher5599]

Do you have to remove the seat in a 2012 ML 350 to access the aux. battery? That's what I am being told by the mechanic.

[@iRepairAutos]

You should not have to remove it.

[@AusTexish]

Great video thanks. Does the nex battery need to be charged beforehand or does it come charged? Also is this the same battery as needed for a ML 320 CDI? Thanks

[@iRepairAutos]

+AusTexish battery comes charged. Same battery for ml 320 cdi, you can also check with the parts dept at Mercedes. They will tel you that for free.

[@AusTexish]

Thanks, this was great and instruction video was perfect. Replaced this yesterday and all came out well. Thanks

[@iRepairAutos]

+AusTexish glad the video helped you. That's for the feedback.

[@denisepiatkowski778]

Great video loads of ACCURATE information !! Thank you

[@tri0xin]

I've got a w211 2003 e500 I'm replacing the main battery.. will the auxillary battery keep power to the electronics/computer while I'm changing out the main battery?

[@iRepairAutos]

Great question! No - the auxiliary battery is for the gear selector and the brake assist. You can avoid losing all your settings by making sure all of your components are zeroed out (completely) off. See the video above on how to do it. You can also connect a settings saver (plugs into your cigarette lighter) but I'm not a big fan of those....

[@iRepairAutos]

No the auxillary battery is for the braking system and gear selection if the main battery is dead. I show how to keep all your settings by zeroing out the mercedes in this video. Please look at the video Thanks.

[@mr.selfdestruct1677]

Would this be the same general procedure for a 2014 Mercedes S550?

[@iRepairAutos]

Yes. Aux battery may or may not be in the same location.

[@Mzmellamzmella]

iRepair Autos I did this changed the battery but it’s still not shifting

[@tedlu008]

Amazing work, single handed!

[@iRepairAutos]

Thanks!

[@monirobaid5809]

hi, I need your assistance I have a 2003 Mercedes e500 and I'm on the process of testing the charge system and both batteries, so the main battery reads 12.7 Volts at fully charged when I start the engine it jumps to around 14 Volts, the auxiliary battery reads 12.95 with the engine off but it will remain the same even when I start the engine, I'm not sure if is that normal Or supposed to act like the main battery plz let me know. note. the auxiliary battery is brand new I will appreciate your response

[@iRepairAutos]

Your charging system and batteries are functioning as designed.

[@monirobaid5809]

@@iRepairAutos thanks very much bro

[@jamesblake5176]

isn't there also an aux battery in the back fuse box?

[@charlenecunningham8410]

This was a very well done and informative video. Do both batteries have to be replaced at the same time, or can you only replace one at a time?

[@iRepairAutos]

Both don't have to be changed at the same time. I suggest changing the auxiliary when changing the main battery, but not necessarily the the other way around.

[@jeanbaptistealmonor562]

Hello, my Ml350 year 2008 only blocks on position P I do not know what to do or why

[@이상택-r3r]

It,s excellent and very helpful.

[@matthewlankford7456]

What is that computer beside that battery?

[@BKLYNBOY7]

i can't find anywhere how to replace the auxillary battery in a 2012 CLS 550, it's located under the drivers side dash and I am supposed to remove the cover under the dash but there are too many wires and the lever for the trunk release connected to it! how do i do this without damaging something? thanks

[@iRepairAutos]

+BKLYNBOY7 get a bright flashlight, and be patient. Look behind all the wires. It's up in there.

[@sheikhlatif9512]

Is the axillary battery in the same location for gl 450 2007

[@khaledKhaled-du1pb]

Hi dear my ml350 2009 I cant start my car when I press the start button not start but theres power but when I restart the battery car start ?

[@johnmunro4758]

I have watched several videos on this subject but none answer the question for my 2015 C-250. Does anyone know where the auxiliary battery is in this model?

[@durodrkafon3569]

The big question is how do I move the electrical seat forward to get to the battery when the battery is empty?

[@iRepairAutos]

Put a battery pack on the jump posts under the hood.

[@rellblackgucci]

I need to remove battery but have no power to seats to move them forward and upwards how can I fix this

[@iRepairAutos]

You will need to put a power pack on the jump points under the hood to give power to the vehicle.

[@joabescobar4919]

Do you work on the gl350 diesel .."? Mine it’s cranking but no start now new batteries in it

[@iRepairAutos]

Check fuel pump fuse, relay and pump. I would plug in a good diagnostic scanner and start looking at dtc codes.

[@candlemedia]

Such a detailed and fantastic video! Thank you for this.

[@iRepairAutos]

Thanks! Glad it's helping.

[@patrickmegie6150]

How to fix all your back lights , tail, reverse, license plate for my 350 4matic 2009

[@alhodge9671]

Hi, I just followed your instructions to a T. But on my 2009, when I replaced this auxiliary battery, I lost a bunch of things, Now my radio does not turn off, and I got no backup camera, is it possible that because the little battery was dead, or almost dead, when I disconnected it, the system lost power and it forgot a bunch of things? I am way down in the Caribbean and there is no Mercedes dealers here for me to turn to. Any suggestions? I'm at my wits end.

[@iRepairAutos]

Hey sorry that you're having issues. As detailed in Video you have to zero out the car before you take the batteries out. For stuck radios/Navs and back up cams, 1. Hold down the power button on the radio until it turns off. 2. Make sure you have your radio code 3. Find your fuse for your radio and backup camera 4. Pull the fuse(s) and wait 10 minutes 5. Reinsert the fuses. 6. You may have to enter your radio code.

[@alhodge9671]

Wow, Thanks, for the speedy reply, any idea where I can find the radio code? Sorry, I am only two weeks owner of a Benz

[@iRepairAutos]

It should be on a card included with your owner's manual.

[@dckmatrixxx]

If I change the main battery should I just change that at the same time also?

[@iRepairAutos]

+dckmatrixxx they say if it ain't broke don't fix it. Except in this case. You should change it the auxiliary battery especially if it's never been changed.

[@JuanGarcia-kv7yv]

Does anyone know if you have to reset the warning message once you replace the battery?

[@barryharrell3355]

Thanks for tell me what the aux battery is for.

[@shwndh]

Keith, you da man!

[@abdullahal-saihati7651]

Hello, can you help with location of 2014 mercedes sl auxiliary battery?!

[@taniavazquez9992]

This was great! I ended up changing the auxillary and regular battery at that. But now I get a red battery symbol popping up every now and then any suggestions??????

[@iRepairAutos]

Hi Tania, What's the year make and model on your vehicle?

[@taniavazquez9992]

Hi it's a 2010 ML350 but I figured it out....its the alternator

[@iRepairAutos]

I'm glad you got that figured out. The battery indicator "RED" comes on as the battery starts to die because your alternator was either dying or dead. Good catch!