Ditto for me...

Had the same leak fixed a couple of years ago on mine (same model, same engine)...it was the timing cover seal on the front of the engine.

..oil hasn't leaked since!

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2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car