Activation conditions

You can activate the HOLD function if:
• the vehicle is stationary.
• the engine is running.
• the driver's door is closed or your seat belt is fastened.
• the parking brake is not applied.
• the hood is closed.
• the transmission is in position D, R or N.
• DISTRONIC PLUS is deactivated.

    See also:

    Safety
    The 2012 M-Class was deemed a Top Safety Pick by the Insurance Institute for Highway Safety, meaning it received the top score of Good in front- and side-impact crash tests, as well as for roof st ...

    System self-test
    The indicator lamp illuminates when you: turn the SmartKey to position 1 or 2 in the ignition lock on vehicles with KEYLESS-GO, press the Start/Stop button once or twice If an adult occupa ...

    Active Blind Spot Assist
    Important safety notes Active Blind Spot Assist uses a radar sensor system to monitor the side areas of your vehicle which are in back of the driver. A warning display in the exterior mirrors d ...