I have a 2020 glc300 and I have a gas cap lose message that triggered my engine light I changed the gas cap twice but I'm still getting the same message and I took it to the dealer twice and they weren't able to find the problem they even changed the canister but I'm still getting the same message

 

If you live in a region that does annual emissions checks, swing by one of the testing facilities and ask them to test your gas cap.

 

moved to X253 forum...