It is either under the Windshield Wiper Cover, just forward of the firewall or in the TRUNK of the car.
buy some engine oil dye at any auto parts store
a uv lamp will be needed to use to locate the leak
this works best with newer cars and so many things in the way
Have to remove the inside door panel & most
likely replace a broken window regulator or cable
for sure obviously it is a piston sealing o rings you need engine Extensive maintenance
Is it turbo charged and if so this could indicate that seal in turbo is bad..
high i have a 2002 merc vito. there is exaust fumes coming through the air vents when moving. i have to keep the air circualting with in the cabin to stop it, but does any one know how to fix my problem?