The front oil leak has been taken care of- my mechanic ended up making his own tool and not having to pull the radiator or anything. It appears it was the chain tensioner bolt that had backed itself out.
Anyway, I still have an oil leak towards the rear of the engine. It is dripping down right near the torque converter. What is the most likely source?
It's dark black, definitely oil and not tranny fluid.
I know that I will have to clean the engine well and then get back under there and look for myself but just wanting some likely suspects.

rear main, valve cover gasket, oil filter housing to block gasket.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

OUCH !!!

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2004 BMW 325 xiT Wagon 40miles
1999 BMW 528i
1995 e320GTO Wagon 137K
GTO means Grocery Transport Only
I LOVE MERCEDES BUT I PREFER HAVING SEX WITH BMW.

I had a leak at the back end of the engine and didn't take the time to really check it out and it cost me a spun bearing. It was the oil filter top wasn't on tight.