Battery AC DELCO or OEM Mercedes

This just happened to me last month on my 2017 C43 on the OEM battery. I guess five years is typical on these newer MB.

My 2007 Tahoe still had the original AC Delco battery in it when I traded it off in 2019. Still turned the engine over like new.

Just recently replaced the 9 year old AC Delco battery in my Impala when it finally went. Was working just fine, then went to start it a few days later, wouldn't crank.

It’s a battery. It doesn’t make a difference. Find an ACDelco one. They usually last the longest for the best price.

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

Been recently thinking that 100 packs of ACDelco for AA and AAA are the best value per watt usage

When you say, \u201ctwo new batteries\u201d are you speaking of the big ones? There is a small one that operate your convenience/comfort items. It looks like a small garage door battery.

Exactly the same issue I am currently facing with a month old GLC300. No resolution yet

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…