One user feedback he’s thinking of changing the starter battery (main battery) in his 2018 Mercedes Benz GLC300 with 42K miles. He want to know if the battery needs to be coded or registered to the SAM or OBC.
The reason to replace the battery is that his wife’s car kept getting the stop vehicle, leave engine running with the battery icon coming up on the DIC. Despite charging the battery twice and the first time for 24 hours and the second time for 48 hours, the warning came back the following day. I took the vehicle to Advanced Auto and they performed a battery diagnostic on it and they recommended replacing it. So I did.
Yes the battery needs to be registered/reset. There is a charging counter that will continue to run if not reset. Apparently the system increases the charge for older batteries potentially overcharging newer batteries. I just topped off my 2016 GLC300 battery with a maintainer since I got the start/run engine low battery warning. Did the same thing last year. Contribute this to little or no driving with COVID. The Foxwell NT530 for Mercedes supposedly will register/reset a new battery. They are $159 at foxwelltool.com. Local independent shop wants $125, an hour, to code a battery. Should take 15-20 minutes at most.
Foxwell NT530 tech support: www.foxwelltool.com