This came about a while back and hasn't gotten better (of course). Noted a smell in the cabin and 1st changed the oil breather assembly.

This is another matter. No codes, car is a 2006 OM648 and still runs like a scared rat with 208,000 miles on it.

What's been difficult is to find a schematic that shows the o-rings and gaskets.

Appreciate any and all input. Bought it new and it's been a great car.

Unfortunately, my expertise is in another German car.

Here are the offending areas.

Attached Thumbnails