I don't know what a dealer charges, but I have a flyer from a local Mercedes Independent, and their price for a 60,000 mile service on an 8-cylinder model is $529.00.
This, of course, does not include the break fluid change nor the radiator coolant change as they are done in time, not mileage. You'll have to add those if you need them.
2001 E430, Bourdeaux Red, Oyster interior.
1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".