Engine burst at 18000km. Reason: the piston coolant was no longer working with a max. oil draught of 50%, which caused damage to condensing bearings and pistons. The oil draught lamp had not lit, although 4l oil had to be replenished. According to the dealer, the indication of the oil pressure has nothing to do with the amount of oil available. Is this really correct, or does not have to sink even with a significant oil loss the oil draught and thus the control lamp for oil pressure drop on The turbocharger was also destroyed. A parameter recall action took place too late. Wailing contact in the oil pressure control lamp.