Hello, I am helping a friend with a 1984 300 D turbo diesel figure out vacum leak issues. I am interested in a schematic and or pictures for where the lines go through the fire wall. I have seen some on this site but not an "under the hood" complete like other vehicles have? I am primarily interested in the black plastic hose through the fire wall what it connects to above the steering column? I have some pictures of that area in the fire wall but they do not seem to talk about this specific line much? I think it might also be the supply line for the resevoir in the trunk? Also, some lines under the hood are not connected.
I wanted to check before removing the steering column or dash removal to find the other end of the broken line. It goes into a metal bracket you can't get much light or your hand into, thanks for any help someone can give. The car has issues with the AC / heat vents, door locks and shutting the motor off. I do mechanic work on American vehicles, not many MB... thanks