B service

I'm about 500 Miles from having to get my first scheduled B service on my 2001 ML 430. What does this service exactly consist of and around what cost. I purchased the truck used, I found the MB dealership where the previous owner purchased the truck. He follwed the scheduled maintenece to the letter according to their records. As I was leaving I noticed a price list on the wall and for this type service it said $375 a little high for me but is this standard?

Thanks