My truck is at the dealers, I started to smell fumes almost straight away after collecting my truck from new, the smell/fumes disapear once you hit the circulate or aircon button.

The service manager says that they have detected the smell and are now trying to trace/solve the problem, I was just wondering if anyone else had experienced a similiar thing, and what was the issue.

the truck is F450 6.7.

 

Possibly the truck was in regen. Mine stunk really bad the first few times it happened. May or may not be your issue.