HOW TO Remove & Replace Mercedes Auxiliary Battery

#mercedes #stopstart #battery

Has your Auxiliary Battery gone flat? Your ECO Stop-Start function no longer working?

In this video, I show you how to remove and replace your Mercedes Aux Battery.

[KeithMurray-mj]

Perfect, helpful that enabled a non DIY person (caveman type) to carry out this task. Very grateful for a brilliant presentation - will now use YOUTUBE for other activities!! Thank you

[pistolCrockett]

Great Video....Thank you for posting it. My battery is located in the trunk in my 2014 E350 (US model). The cost for the OEM part from a Mercedes dealer was $210 without the returning the core ($45.00 old battery) so $210.00 - $45.00 = $165.00 my total cost.

[themword]

Your instructions was direct, simple, and thorough. No more Auxiliary Battery Malfunction message. Thank you much.

[SatoshGirl]

Hello. I have a 2015 E-350 Benz, and the Auxiliary battery malfunctioned. I sprayed the bolts with WD-40 2X each, for 3 days in a row. And BAM, Surprise, (the battery's bolts were covered with corrosion before), and now the WD-40 Cleared Up the corrosion and Battery Works great! Saved me $250++. HOPE this helps everyone! Happy New Year! Thanks for this Vid all the same. Ps. if you use this method and the battery is till Not working, keep spraying it daily, it will Revive, especially if you're in Cold weather like North East USA. Do this also on the Main battery next to your engine so it keeps it Form Corrosion!

[stephenfoxall]

All very useful thank you. Second batteries all new to me. Only thing missing is that there was a hard plastic cover over the aux battery. I have to discover how to remove the two plastic knobs that look like trim buttons. I have a trim tool. Tomo perhaps.

[christoo]

Bugger paying for a Mercedes just used a motorcycle battery...specifically a YTX9-BS £22 off ebay.
Job sorted.

[pppam]

Hi,  from what I know the start stop function is based on the main battery and not the auxillary one.  This battery is used supportive features such as the collision assist, probably climate control as you mentioned.

[Dominican]

Where is the aux battery located in the W213?

[Allm-pkop]

hi I have changed the aux battery on my 2013 ML 63 and now the car doesn’t start only the ignition comes on
Any thoughts ?
Did you have to reset/plug the obd in after changing the aux battery?

[djn]

Thanks for the good video. Do u know what the aux battery is referred to as in the manuals? I cant find a mention of it anywhere in my aclass manual

[moj]

Thanks for the vid? Any idea if motorbike batteries will work as a cheap replacement? Or does it also need to be AGM?

[qK]

Hi 👋🏻 there, I got question. What if the new battery doesn’t have a port and it’s not connected to this degassing pipe ?? 🤔 My auxiliary battery was gone and since can’t find here that particular Mercedes Fiamm, was installed a Banner (Austrian company) battery, but now the degassing pipe sit aside and not connected. The car work properly for now, W 204 face lift. Thanx in advance for your reply 🤗

[emcdkoala]

I had my main battery replaced last week on my B200 d 2014, ..(Australia)..by Mercedes roadside assist (contracted out, so no mercedes technicians) have issues with eco start since, (failed to restart at an intersection, not good) Is there any resets needed with this, .. I fixed the clock..! Now today I have an alert on my dash, .. auxiliary battery malfunction!.. Maybe I now need an auxiliary battery also.. awaiting appointment at Mercedes in two weeks for technical check etc.. Any advice in the meantime?.. thank you.
battery?

[jaishivshanker]

Hi I've just replaced my auxiliary battery but the icon of a battery in dashboard is lighting up. How do I get rid of the warning icon.

[RDKSHOTU]

I just replaced my 2013 c300 and it does not work what’s going on ?

[davidwerner]

You could have put the model in the title. Mine is not in the boot.

[andreydorosh]

Awesome! You inspired me to get a cls... Keep making the videos. I don’t have the brake light on my diffuser do to being in North America. Can you by any chance get me a parts number or someone that sells them? I would like to install that on my Cls. Thank you!

[astrasfo]

My W212 trunk battery negative terminal is corroded. How should I approach this? BTW, Rock Auto sells the Bosch equivalent for $125 delivered.

[bullk]

What if I’ve replaced that battery and I still have the same auxiliary battery warning ? 😢

[-RONI]

Where can I get these battery, if I’m out of USA?
Thank you