I suspect it is the individual hoses on the returns of the injectors that may be leaking. More typical of the old rubber hoses on these diesels by far than any other leakage. At least in that area.


I do not know your 240ds year of manufacture. Over time components in the fuel linkage deteriorate. Any owner should periodically check to see if someone presses the pedal to the floor. That the lever on the injection pump goes as far as it should. My 1983 one has a deviish setup where there are two rubber inserts on a fork transmission universal joint. The actually rot and disentigrate with time. Allowing so much slop the lever on the injection pump is badly compromised in advancement.


As far as I know the two rubber sleeves may be the cheapest parts available for these cars at a dealer. There are no aftermarket. Around a dollar if needed for two should not put you in the poor house. Actually for the amount these engines really vibrate. To me is remarkable how long the linkage components stand up.