Timing case O-rings and thermostat housing
M113Oil and coolant mixing, or a coolant leak at the front of the engine.
Shares the M112's two failure points: the timing case O-rings rather than the head gasket, and a thermostat housing gasket that leaks at the front. Both are age rather than mileage. Otherwise this and the M112 are generally regarded as the most reliable Mercedes engines of their era, so a well-kept one is worth repairing.
Parts this needs
Checked against benzworld.org

