GM
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Cruise Control Disabled Conditions
Cause:
    Engine running, then PCM detected any of the following: vehicle acceleration 10 mph per second, traction was active, Decel of more than 4 mph per second, a vehicle speed error, engine speed out-of-range rpm fault, or a fault in the Park Neutral Switch.

Mercedes-Benz
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Brake pedal position (BPP) switch - malfunction
Cause:
    Wiring, BPP switch, trouble code(s) stored in other system(s)