Battery Energizer or OEM Mercedes

the only time it failed me was when the battery died after 100k miles.

It has been in there since 2016 and still works fine.

I've noticed the 20xx Energizer series seem to be made in Japan. Refreshing since they don't stink like the Ikea MIC ones.

I just ordered the energizer lithium fob battery, will see if it lasts longer than the regular energizer which in my case was 3 years

I didn't get long lasting power from "any brand name". Switching to Energizer or Panasonic did much better, like 2 years.

Now I stick to Energizer Max batteries, they claim a 10 year shelf life, and I have some that are 5 years old that are still near 100% state of charge, with no leaks.

Mine went at 32K...just crapped out on me one morning. Luckily I work part-time at a Tire/Battery Garage. Put in an Energizer group size 47 (as stated above)

I had the same problem. My car was brand new too but was sitting for a bit before it was sold to me. I brought it in to get charged a few times but the message was still coming up and I was definitely driving it enough. Eventually they just changed the battery under warranty.

The batteries Mercedes uses seem to be really poor quality. I have a daily class and it seems they are changing the battery every 1.5 years so far on average…

I've dealt with this issue on both of my newer AMG vehicles. My older ones never had this problem. From my understanding, this is caused by the new mbux system being a bit of a power hog. I eventually had to invest in a trickle charger, and I have to charge both of my AMGs 3-4 times per year. It gets worse as your battery gets toward the end of its lifespan.