You might look in here and see if you can come up with something.
http://www.ps2cho.net/downloads/MB%20CD/W124/Index/605_606index.html

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84 300D, 82 Volvo 244Gl Diesel

I recently had all of the clear lines and IP outlet seals replaced on my 98 to mitigate acceleration lag and a light aroma of diesel in the engine compartment... The indy where I had the work done mentioned that there was a service bulletin on the rubber hoses that connect to the metal supply and return fuel lines... It seems that the rubber dries out, cracks under the hose clamps and leaks air creating a similar situation as leaking plastic fuel lines... He said you can replace the rubber lines or just cut an inch or 2 off of the ends and reclamp them in place, which is what he did for me... It turned out that only one of my plastic lines was damp with diesel and the IP seals were fine... After a full tank or 2 the air was clear from the lines and the car has run fine since...

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Joe

1998 E300D turbo 240K + Miles
2000 Dodge Dakota 122K + Miles
1992 Mazda Miata Autocross Machine 143K + Miles
http://www.renegademiata.net

Any man who is under 30, and is not a liberal, has no heart; and any man who is over 30, and is not a conservative, has no brains. - Winston Churchill