Hello!
My '81 300SD recently developed a very irritating problem.
You can really smell fumes in the cabin when you stop at a light.

Car runs great with minimal smoke except when floored.
The diesel smell/fumes inside the cabin is really irritating and gives a head ache. Also, after alighting from the car my clothes smell like diesel fumes.
Would like to request for leads on where the fumes are "leaking" into the cabin. Also, what can I do to prevent the fumes from entering the cabin.
Thank you.