I don't know for sure but I know on VW you need to program the new battery for it to work properly and I'm going to guess and say that may be the same with Benz & BMW BUT if you get an OEM battery it will be the same size/CCA and other specs so its an easy drop in and connect. However if I were you I would maybe call a good euro shop and get their opinion on it they may tell you otherwise.
yashgandhi wrote: ↑ He said he saw some Mercedes and BMW used aftermarket batteries and vehicle computers didn't work properly. I told him that I got energizer AGM battery from Costco but haven't installed it yet. He said return it and get it from dealer or interstate.