YTX14-BS Battery Replacement for Mercedes Backup Auxiliary 2115410001

The mighty max is a quality product, dependable and reliable.

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.

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.

2016 Mercedes-Benz CLS 400 : I was having a SRS malfunction light pop up on my dash and then the car wouldn’t start. By chance I remembered I had an auxiliary battery message before all this and went ahead and ordered this in hopes I would have to take it to the shop and pay a lot of money . And IT WORKED , got to put the nuts inside where the bolt goes to hold in place or else it won’t go in . But then I had to charge my main batter for a bit . I’m sure you can jump start it to . But it turned on no issues . Drove around for an hour to make sure . Saved me time and money . Don’t let you’re auxiliary battery die on you

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 !

Lasts for just over 2 years! I bought one of these 2 years back and it has just stopped holding the charge. I ordered again because It's still worth it for It's price compare to original Mercedes price.!!

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

I recently purchased the Mighty Max Battery YTX14-BS to replace the auxiliary battery in my Mercedes E250, and I regret it deeply. While it fit properly, the battery poles are extremely weak and will break if you have any tension on the battery cable; mine broke within just a week of use, leading to complete failure. To make matters worse, there’s no warranty offered, which feels like a scam. This has been a total waste of money, and I cannot recommend this product at all. Save your money and look for a more reliable option!

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.

Fits perfectly in my car

Excellent product. Exact fit to my Mercedes Benz B250 2024 model. This battery goes below the glow box section and required proper voltage to perform security and entertainment functions. Very happy with this product and got on time as expected.

The auxiliary battery went on my car - by far the cheapest price we could find - waited about a week for it to come but now its in and so happy to have my car running again

Works great. Quad running again