Here's the service schedule according to my MB service booklet (the one that MB USA supplied with the car).
A-Service — First visit at approximately 10,000 miles or 1 year, but determined by Flexible Service System; then every 20,000 miles or 2 years.
Services performed:
Interior
1. · Function check
2. · Check warning and indicator lamps, illumination and interior lighting
3. · Check windshield wiper, windshield washer system, headlamp cleaning system
4. · Reset maintenance service counter in instrument cluster
Wheels, brakes
1. · Check front brake pads for lining thickness
2. · Check tires for damage, condition
3. · Correct tire inflation pressure
Engine compartment
1. · Change engine oil and filter
2. · Fluid level checks of the following:
1. · Engine cooling system, antifreeze and corrosion protection
2. · Windshield washer system
3. · Brake system
3. · Check and correct battery fluid level
4. · Check battery condition
5. · Check catch, safety catch and hinges on engine hood for proper operation
Trunk
1. · Correct tire inflation pressure in spare tire
2. · Check battery condition
B-Service — First visit at approximately 20,000 miles or one year after previous service, but determined by Flexible Service System; then every 20,000 miles or 2 years.
Services performed:
Interior
1. · Function check
2. · Check warning and indicator lamps, illumination and interior lighting
3. · Check windshield wiper, windshield washer system, headlamp cleaning system
4. · Reset maintenance service counter in instrument cluster
5. · Replace dust filter (not applicable to SL-Class)
6. · Replace combination filter (SL-Class)
7. · Check parking brake (function test only)
Wheels, brakes
1. · Check condition/thickness of front and rear brake discs
2. · Check front and rear brake pads for lining thickness
3. · Check tires for damage and condition
4. · Measure tread depth, record in mm
5. · Correct tire inflation pressure
Underside of Vehicle
1. · Check for major components leakage
2. · Check for chafe marks, line routing, damaged components
3. · Check condition of front axle ball joints and rubber boots
4. · Check condition of mechanical steering components and rubber boots
Engine Compartment
1. · Check for major components leakage
2. · Check for chafe marks, line routing, damaged components
3. · Check and replenish all fluid levels
4. · Change engine oil and filter
5. · Check engine cooling system, antifreeze and corrosion protection
6. · Check brake system
7. · Check power steering
8. · Check Active Body Control
9. · Check windshield washer system
10. · Check and correct battery fluid level
11. · Check battery condition
12. · Check catch, safety catch and hinges on engine hood for proper operation
13. · Check condition of poly V-belt
Trunk
1. · Check battery condition
2. · Correct tire inflation pressure in spare tire