I just realized that my C240T has clocked over 22,000 km since last oil change . The service indicator shows I still have 900 kms till next service and the engine purrs like a cat. The car is used occasionally (week-end and holidays mostly) but then generally for long distance travel on 90% motorways. I have replaced around 1lt of fresh Mobil1 with same oil in the engine since the last service. This distance since last oil change is definitely not normal but has anybody seen this kind of thing happen before, or has the indicator gone bonkers?