I need to replace the battery in my 2015 C63 W205 model. It's losing charge over a couple of days - and there is no parasitic drain - I think it's just had it.

Are there any special considerations? Does it need coding / xentry or anything like that? Or just remove and install replacement?

And should I just stick with regular Mercedes replacement, or is there a better alternative?

thanks !

 

For starters, I'd take it to the dealership and see if they can warranty replace it. If the car is a 2015, it should be covered under your normal limited 4 yr/50K mile vehicle warranty. If the battery was purchased over the parts counter (I can't see how that would be the case if it's only 2-3 years old), it comes with a 2 year/unlimited mileage warranty.

Regarding brand, for normal applications (ie not talking about high end heavy load specialty batteries), I believe Interstate batteries are the best, and have some of the best prorated warranties as well. But I'd take free from Mercedes over a better Interstate battery for $$$. Just my $0.02.