Mercedes-Benz GL-Class: Setting a speed - DISTRONIC - Driving systems - Driving and parking - Mercedes-Benz GL-Class Owner's ManualMercedes-Benz GL-Class: Setting a speed

WARNING Keep in mind that it may take a brief moment 
Keep in mind that it may take a brief moment until the vehicle has made the necessary adjustments.
Increase or decrease the set vehicle speed to a value that the prevailing road conditions and legal speed limits permit. Otherwise, sudden and unexpected acceleration or deceleration of the vehicle could cause an accident and/or serious injury to you and others.

Press the cruise control lever to the pressure point, up 1 for a higher speed or down 2 for a lower speed.
Keep the cruise control lever pressed until the desired speed is reached.
Release the cruise control lever.

The new speed is stored. DISTRONIC is activated and adjusts the vehicle's speed to the new speed stored.

    Switching on DISTRONIC, storing andmaintaining the current speed
    WARNING   The vehicle can be braked when DISTRONIC is activated. For this reason, deactivate DISTRONIC if the vehicle is to be set in motion by other means (e.g. in a car wash or by tow ...

    Making adjustments in 1 mph (Canada:1 km/h) increments
    ► Briefly press the cruise control lever to the pressure point, up 1 for a higher speed or down 2 for a lower speed. The last speed stored is increased or reduced. ...

    See also:

    Important safety notes
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    Headlamp removal
      WARNING Do not attempt to change any bulb with the lighting switch on. If the lighting has just been switched off, give the bulbs time to cool down. Handling them in a hot conditio ...

    Electric parking brake (EPB)
    WARNING Do not rely on the parking brake to hold the vehicle stationary if the brake warning lamp is illuminated or the EPB warning lamp is flashing. Seek qualified assistance urgently. ...