Exhaust fumes in air vents

Exhaust fumes in air vents

Exhaust fumes in air vents

Hi I just had my 2011 VW Polo in the garage for a service and MOT . Since I got it back I can smell fumes coming out of the air vents but only when I reverse. Any idea what it could be ? I looked under the car to see if the exhaust was damaged but it seems ok .

Thanks

by Daviesmith

This has been automatically posted in the DIYNot Forum on DIY Talk. The new DIY Forum