Since your car is approaching 60,000 miles, I bet the "Service Due" is the Inspection II. Not sure what is included in that for the E82, or how much it costs. I'm sure they change the oil, air filters, etc. and probably inspect the brakes, suspension components, etc. Wonder if they change any other fluids (tranny, diff, coolant)? You could maybe get a list of what's included from your local service department.