I have a 2025 GLC300 just over a year old, Recently my check engine light came on after going through a car wash. There was also a brief message about servicing the 48v system. The text message disappeared almost immediately. The check engine light stayed on for 2 days, then went off. Any idea what could cause this behavior and if I should be concerned, Thanks

 

Minor fault (because it turned off again), so have it examined at next regular service.