[ss134]

1. It is Ok to have the service done early so that is not a problem.

2. The M3 takes 8.8 L of engine oil - if they put in 9 quarts that would = 8.5 Litres which would explain why you are not at max ......it is nothing to worry about as long as the oil level is between min and max , if the car needs oil it will tell you! Better to have the oil slightly under max than over which could damage your engine. My car also came out of the service with the oil reading under max.

3. I experienced the clicking noise straight after my service but it was gone within a day or so.........just make sure they did not change your DCT gearbox fluid....only engine oil and diff oil should be changed for DCT cars, there are reports of some members having their DCT oil changed and having problems with the transmission afterwards.

Good luck.