2005 c230 kompressor 6-speed. Within 150 miles around 1 liter of coolant leaked into the oil. I don't believe it is the head gasket because there are no signs pointing to it. I'm thinking it might be either the seal/gasket behind the thermostat or the seal/gasket behind the water pump, the ones that seal the timing chain cover to the engine. Any thoughts? This is my first Mercedes and I've only owned it for less than 2 weeks..