Battery OEM Audi 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.

Can confirm, worked at a battery store for a few years throughout college. Audis for some reason always lasted much longer than any other car brand.

My S4 battery is going on 6 years and it pops off like a brand new battery in Minnesota weather.

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

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.

I had to replace my comfort battery as well 2 weeks ago. The please start engine warning came on all the time before cranking. I ended up getting the batterie from an Audi dealer since the local VW dealer didn't have one in stock. At Audi the battery actually cost $ 60.00 less than if you would buy it from VW.

Sounds about right for a dealership, just had my battery replaced at a euro shop and it was 448 total

Replace battery with OEM battery AFS still in operable on and off.

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.