Battery OEM Honda 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 '11 Fit had a aftermarket 151R battery. Mine occasionally produced a similar noise such as this on cold day starts. I think the noise stems from the starter, perhaps the starter solenoid that doesn't retract after you release the key from start position. My issue went away after I replaced the battery

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

Yes, very true. The closest you get to 100% SoC, the more the battery degrades. The ideal SoC would be at around 50-60%. But 80% is also good. (My EV has its lowest limit at 80%).

I’d take a Honda battery over a Subaru one any day if the week.

The stock battery in my 2016 Honda died after four years.

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…

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.