My car's favorite is "crankcase overfilled, proceed to MB workshop" or some such. The first time this appeared, I thought it possible that coolant was flowing into the crankcase and of course it wasn't. The dealer reset the oil level parameters a bit but still on occasion I see it. I just dismiss it. Another is "ESP (including ABS) Unavailable". A restart fixes that.

We'll see what built in faults my '08 C300 has. If it ever shows up.

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Roger E.