Mighty Max Battery YTX14-BS Battery Replacement for Mercedes Backup Auxiliary 2115410001

After reading the reviews on this battery I was a little worried that the other folks who had mentioned the issue of the bolts/nuts not fitting would also create an issue for me. I didn't need to worry! Installation was a breeze. I unbolted the securing bracket, removed the negative battery terminal first (as you ALWAYS should) then the positive terminal; and simply lifted the battery out. Installation was just as simply, facilitated by the fact that the battery terminals have a neat little trick. The nuts inside the terminal can be located for a side or top bolt mount. I simply slipped the nuts from their side mount shipped position, added a little dielectric grease to hold them in the top mount position, and simply used the OEM captured bolts. It really was simple! The whole job took less than 10 minutes to complete. Gone is the warning light on the dash! It really is perfect for the job, and given the price compared to the OEM battery, great value. I'd buy it again, and recommend it to anyone who needs to replace the auxiliary battery in their Mercedes E Series or W211 car.

Excellent, better that factory

Perfect fit it solved all my charging problems.

Easy to install and working great. Fixed auxiliary battery malfunction error and vehicle is operating perfectly. I would advise that this battery be charged with a trickle charger before installing. It comes charged but is easier on the whole system to fully charge it up prior to install. Also, do disconnect the negative terminal on the main starter battery under the hood before swapping out the auxiliary battery. Just good practice.

Bought this battery for my 2015 Mercedes CLA 250. my car have been acting weired on the Start Stop feature on the car ! when it when to a stop on the road! when coming back to drive the car will cease! I had to restart! no indication of changing the AUX battery! but after reading much I found out it maybe the battery! bought this and follow youtube to install! it was really simple ! unscrew the two wire and battery fit like a glove ..Battery has same spec and size as the Mercedes OEM battery which cost 5 times the price. Overall! am happy with this purchase. After changing all works AOK! screw back the screws and pop back the covers !

This replaced aux battery location in trunk of2012 cls63 w eco start

It is currently used as an Auxiliary battery in my Mercedes.

I love this product. This product was very very easy to install. I cleaned the battery terminals before I installed the battery. The old auxiliary battery that was on the car was causing problems and giving a battery warning light every time I started the car. It turned out that the old battery that was powering the SBC pump was going to explode. The negative terminal on the old auxiliary battery had some electrolytes coming out of it and if I kept driving the car I was going to need a brand new battery and possibly an SBC pump. I changed it out and the battery warning light went away. I would recommend this product if your W211 is having a battery warning light on. Plus it looks cute.

grate , As i expected & good packaging.

Thank you Mighty max and Amazon, its a perfect fit, the nuts came with it was perfectly screwed into the existing merc bolt and it took only 5 mins to get it replaced. It was showing to deliver on 29 May and came extremely fast today. It doesn’t have any external pipe to fit like the Mercedes one, I just left as it is, as its SLA. Its just a wooow thing, I started a car and aux malfunction is no more. I will test how long it last, but today I am happy as they gave 3 more months warranty coupon with it. Once again thanks and echo mode started relentlessly, just drove a long way.

Perfect fit for Mercedes SLC300 Backup Auxiliary and costs a lot less compared to Mercedes's original Battery. Hopefully, it will last, time will tell.

Works great. Quad running again

It's working satisfactory