I’ve been burned before by a mobile mechanic who promised OEM and showed up with something that looked suspiciously generic, so now I’m paranoid about anyone who comes to my building. My E-Class needs a new battery and I keep seeing ads for mobile services around Dubai but I have no idea how to separate the legit ones from the cowboys. A neighbor mentioned he sorted his out through https://batteryzoneuae.com/mercedes-battery-replacement/ and said they let him check the battery before installing, but I’m curious what else I should be looking for. Do you ask for serial numbers, check the manufacturing date, or just watch them like a hawk? I don’t want to be that annoying customer but I also don’t want to get stuck with a dud that dies in six months. Any tips from people who’ve actually done this would be appreciated.