In the meantime, it had several times the problem that it smelled like (diesel) exhaust in closed windows in the interior. On faster sections it does not occur, but often: – after engine start – on slow sections – on gradients. Have already experienced this in different places, so construction machine exhaust can exclude etc.. Independently of me this was also criticized on the passenger side… Maybe there is a connection here to my different exhaust pipes: left inside normal black, right inside virginally new. Does anyone have an idea? Thank you in advance.