I have a 97 E 300 D (Model 210). My question is how do I access the leak which is in the bypass lines around the injection unit?Could be anything but I can't get to it?

Overhead access is prevented by the cast aluminum crossover tubes. I tried to remove the tube running from the air cleaner to the larger mass of tubes but it won't come off. Took all the bolts out on each side but it won't budge

Any ideas?

With 92k miles and cooler weather its probably a seal

Dumb me. Take out the washer reservoir!

Looks like the leak is the seal between the IP and the shutoff switch. There are two bolts to take out of the shutoff switch?

Hi 97dieseldriver

I had a similar problem on a 1995 C class W202 with a 605 5 cyl. diesel. You,re right its hard to see where fuel leaks from in this area. Like you, I thought it might be coming from the shut off module but didnt want to fool with something I didnt understand.On My IP, the throttle is controlled electronically from the ECU, and a 4 pin connector goes in to the IP via the cut off module. I,ve read the horror stories about 'runaway' engines & didnt want to risk that. Anyway, what I found was that my leaks came from the 'O'ring joints on the clear plastic pipes. I replaced them all (6 I think). The dealer said he sells loads of these. The,re fiddly to fit as its easy to nip the O ring, which leaks if it has the slightest nick on its surface. If you do take these pipes off it takes an age to bleed the system, My 5cyl. doesnt have a hand primer so I just have crank for about 30 secs. Hope this helps! P.S. if you did unbolt the shut off module, what did you find? Did it go back on easily?

Peter O Hara

Easy to take off provided you have small socket head. There is not much room around the torx bolts. In my case, the internals were leaking.

Thanks for the advice on the orings.