Diesel fumes and camp smoke drawn in by air conditioner

[Camper2209]

New to the RV world. Have a 2013 MB Sprinter class B. I am allergic to smoke so evenings in campground are a challenge. Windows are closed tight and air conditioner is turned on. If there are diesel fumes or smoke in certain areas around the van, they will be pulled inside the van.

Not sure how it is getting in or where the smoke/fumes have to be around the van for it to happen. Does not happen all the time, but when it does happen the air conditioner is always on. Any ideas why this is happening and how to track down the entry point?

[2oldman]

Ooh.. that's not fun. Campgrounds can be very unhealthy places with no wind and lots of fires.

I don't know... perhaps you have leaky door gaskets..? Most a/cs do not draw in outside air.