When you remove the splash pan, inspect the oil pan. The oil pan gasket will leak after that kind of mileage ash been logged. It will look dirty and oily as well.

Not sure for the M103, but removal of the oil pan requires jacking up the motor a bit to allow the pan to clear the crossmember that gets in the way of de-installation.

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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