have approx 9000 miles on my 2003 c230 kompressor since my last oil change. Just checked the oil level and it says to add 1 qt to reach maximum oil level. Is this normal to use a qt of oil in 9000 miles. I spoke with several dealerships and most tell me it is. They also say that it probably only needs about a half qt and the FSS system is not that accurate. I run Mobil one syn in this car. No leaks eaither. The car has approx 53000 total miles on it.

I have similar experience with my 05. The operator's manual also discusses this topic IIRC.

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1982 240 D, 308,000 - 321,127 miles (sold)
1982 300 TD,166,500 - 226,000 miles
1998 E 320, 120,000 - 144,000 miles
2005 C 230 K, 26,000 - 77,000 miles (sold)