Replacement for Mercedes-Benz N000000004039 Battery - Replacement UB1213 Universal Sealed Lead Acid Battery (12V, 1.3Ah, 1300mAh, F1 Terminal, AGM, SLA) - Includes TWO F1 to F2 Terminal Adapters

So far so good . Was sceptical not going with OEM on mercedes but it's doing well after a month still.

Advertising this as a secondary battery for a real car is tantamount to false advertising.

not so easy to install and may require to remove passenger seat and even cut open carpet if battery (main and aux have never been replaced. Worked as OEM

Finally installed this in the E-350 and it worked first time I used it without any problem at all-no memory loss by the car as well.

I had a little trouble putting it in because the post were in opposite position than the original I was able to get it in

Installed into a 2011 Mercedes E350 wagon. Size is perfect but the terminals are opposite of the genuine Mercedes battery making installation more difficult. A larger terminal also needs to be soldered onto the positive side. It works but be prepared for some extra work and hassle.

Solved the issue on my 2011 Mercedes E350 I have had it in several months now and I have not gotten the warning display.The installation is a bit tricky on my car. But if you watch a bit of YouTube videos and are determined you will get the job done.. Saved a ton of money compared to what the dealer wanted.Absolutely worth it.

so far works well, just don't like the fact that it didn't match the OEM polarity setup...hope it doesn't cause an issue going forward