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.

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

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

The size and specifications of the battery are fine. However, installation required modifications to the car’s pos/neg cable connectors. In the 2013 GLK350 the original battery terminals are inset more than 1” from the edge of the battery. This replacement has then at the edge. I had to modify the cable connectors to allow the metal battery cage in the car to close on this battery. The battery works fine, but you need to understand that it is not just plug-and-play.

I purchased for my 2016 CLA 250 4 matic. I knew I needed it when my eco start cut the car off every time I came to a stop too long. I searched for the right battery and saw this one. It was a great price and exactly what I needed. It came a day sooner that I expected. My husband installed it with ease. All is right with the world!

Good fit for 2015 E350 wagon. You can use the original terminal screws, but you must use the nuts supplied witht his battery, they slide under the terminals, a bit of a pain to line up but doable. (Keep a magnetic grabber tool handy.) The original battery has an overpressure exhaust port on the side into which a routing tube is inserted. This replacement battery has only a tiny overpressure relief hole on the top of the battery. It will get covered up by the battery clamp, so I sealed the hole with duct tape and drilled a hole off to the right side, still on the top of the battery, where the tube can reach and is not blocked by the battery clamp. If you select the right drill bit (must be metric, I didn't have the exact size but a 3/16“ worked after I reamed it out a little), the tube end plug will fit right into it. There is empty space between the top of the battery shell and the innards, so just drill lightly until you puncture through and you'll be fine.

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