Thanks BENZ TEK

I only have the generic OBDII Scanner and it is showing no codes when connected to the port by the drivers knee. Can I use this scanner for the traction computer or is it time for a real MB Mechanic? If I can use it on the Traction Computer (BAS/ASR module I assume) what is the procedure?

Cruise control does not work.

Is the relay in the main fuse box in the engine compartment? Should I try a relay replacement and brake switch replacement before the dealer?