nlzmo400r

2013 ML350 ~ 55k miles; check engine light came on a couple of days after filling the tank with fuel. We've owned the car for a couple of years, only fill to the first click of the pump. I pulled the codes and saw P0442 and P0456 (No description available). I went for the low hanging fruit first and checked the fuel cap. It was secured fine, but I removed it, cleaned the gasket (which still looked to be in good shape). I also cleaned up the filler neck where it secures and reinstalled. Code persists.

The next morning (today) my wife says while sitting at a stop light not far from the house, she thinks she smells gasoline. A/C was on, but not on recirculate. She the turned the A/C off for the remainder of the trip to work and noted that she didn't see the smell anymore. I presume my next things to check will be the purge valve, but her saying she smelled fuel has me worried. Is it possible a fuel pump/sender unit could be leaking/venting into the cabin?

If there was fuel fumes in the cabin I can't imagine a leaking charcoal canister would be the culprit. However a leaking/failed purge valve or connection is pretty close to the cabin air filter inlet, so that would make more sense to check first. Any advice is welcome.

Maj. Dundee

You are on the wrong forum.

https://mbworld.org/forums/m-class-w166-149/

nlzmo400r

Thank you. Can this one be moved?

Maj. Dundee

Copy your original post. Then click on the link I supplied you with and become a member and then paste you post.