the fuel return lines are the most frequent source of leaks. and very easily changed. they go in loops from injector to injector. i would buy them from the dealer or a mb parts supplier. they are cheap easy to replace and last a long time...but not forever.

tom w

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.