M117s leak at the valve cover gasket down the back of the engine for some reason. Check also to see if you have an oil pressure sending unit on the rear of the left head (I have a mechanical gauge on the 280SE, a common leakage point).

Peter

__________________
1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!