Brand new 2023 GLC3004W had check engine light turn on. Code popped is P0456A. Literally haven't even put new gas in the car yet since purchase. Any ideas on severity of this?

 

Looks to be emissions related. Try tightening the gas cap just in case. Not severe, but if persists, have dealer check it.

 

@humidcity did you get this resolved, what was the issue?

 

Yes dealer had to get a part sent over from Europe to fix. It was emissions related. Talk about lack of preparedness that they didn’t have parts for these new cars in USA but were already selling them willynilly. Thank you for following up!