So I’ve got this frustrating issue with my Mercedes that’s been bugging me for the past few days. The main battery seems fine, starts the car without any problems, but I keep getting this warning message on the dashboard about the battery and the start-stop system hasn’t been working at all. I did a bit of reading and apparently these cars have a secondary battery that handles all the electronics when the engine is off, things like the infotainment, climate control, and the start-stop function. I’m guessing that’s what’s acting up because everything else seems normal. I live in Al Barsha and I’m wondering if anyone knows a reliable place to get an auxiliary car battery replacement in Al Barsha that won’t charge me an arm and a leg. I’ve seen a few mobile services that come to your house which would be super convenient since I work from home, and I know some of them offer free diagnostic checks before they even start any work. I’m also curious about how long these auxiliary batteries typically last and whether it’s something I need to get sorted urgently or if I can leave it for a bit. If anyone has dealt with this on a Mercedes or similar European car and can recommend a trustworthy workshop or mobile service in the area, I’d really appreciate the advice because I’m not keen on driving around with warning lights on my dash.