Conditions for activation

RACE START can be activated when:
• the doors are closed.
• the engine is running and it has reached an operating temperature of approximately 176 °F (80 °C). This is the case when the engine oil temperature in the multifunction display stops flashing.
• SPORT handling mode is activated.
• the steering wheel is in the straight-ahead position.
• the vehicle is stationary and the brake pedal is depressed (left foot).
• the transmission is in position D.

    See also:

    De-registering (de-authorizing) a mobile phone
    Mercedes-Benz USA, LLC recommends deauthorizating in both COMAND and the mobile phone. Subsequent authorization may otherwise fail. To call up the telephone menu: press the function button ...

    BAS PLUS (Brake Assist System Plus)
    BAS PLUS is only available in vehicles equipped with DISTRONIC PLUS. Observe the "Important safety notes" section. At speeds above approximately 20 mph (30 km/h), BAS PLUS assists ...

    Parking brake
    WARNING   Engaging the parking brake while the vehicle is in motion can cause the rear wheels to lock up. You could lose control of the vehicle and cause an accident. In addition, the ve ...