Mercedes-Benz

FSS+ 1-20 defined:

1 and 3 = A service (3 is oil change)

2 and 3 = B service

4 = Brake flush

5-7 not for U.S.

8 = Engine air filter

9 = n/a

10 = panoramic sunroof service

11 = Fuel filter

12 = Spark plugs

13 = Coolant renewal

14-19 n/a

20 = Transmission service