I recently had some work done on my '85 300D. One of the issues noted by the mechanic is that the "turbo oil supply line leaks off back of oil filter".

I'm having a hard time locating where that is and what part replacement part I will need to purchase. In searching I find more about the turbo oil drain leaks.

Any pointers would be appreciated. Is there a prefferred name to "turbo oil supply line"?