Casil 12V 1.2Ah SLA AGM Battery – Rechargeable Auxiliary Power – Compatible with Mercedes-Benz N000000004039

Item came quickly and was packaged well. Its slightly heavy and designed lovely. Good quality too. It only took about twenty minutes to install it into my Mercedes E350 and works great. The aux. battery light went off on the console after I replaced the battery.

Exact fit fir my 2012 Mercedes GL450. The auxiliary battery malfunction light is off.

Got my rechargeable light back in action. Perfect fit.

Fits the Mercedes ML 350 perfectly! Same size, same volts, same amp hours. Everything is the same. The only difference is the polarity is reversed (The positive on the OEM Battery is where the negative post is and the negative post is where the positive is ) The posts are only about an inch apart so its NOT an issue at all. It is clearly marked Red and Black so unless you're an idiot you won't hook it up wrong. Put red clip where Red post is and Black to black! dahhhh. Also I watched a you tube video on How to R&R found one that said make an incision on the side carpet in the med bag holder and you're in ! SAVES 3 hours of Labor! your in and done.done! Well worth the cut! Money! and TIME SAVED! (Took me longer to write this review than to install without issue)

Not an exact fit but it works. This battery is a bit smaller than OEM and the positive and negative terminals are reversed from OEM.

Why spend all that money for the original battery when this one works and last just as long as the original and it’s plugged and play. It came fully charged and the battery light went out on the dashboard. The main battery is the biggest issue getting out to get this little battery installed.

I used this as a substitute for the OEM auxiliary battery on a 2009 Mercedes ML550. I works great just like the original.

I bought this to use as an auxiliary battery in a Mercedes as a substitute as it is a lot less than the Mercedes battery. However, I guess this is another example of you get what you pay for. It arrived only partially charged. I tried charging with my charger. It would not take a charge, and ultimately failed. AND, moreover there is no mechanism to return this. You can only get support via making a phone call. An AWFUL experience.