Automatic locking feature

The vehicle locks automatically when the ignition is switched on and the wheels of the vehicle are turning at a speed of more than 9 mph (15 km/h).

You could therefore be locked out when:
• the vehicle is being pushed.
• the vehicle is being towed.
• the vehicle is being tested on a dynamometer.

To deactivate: press and

hold button 1 for about five seconds until a tone sounds. To deactivate: press and hold button 1 for about five seconds until a tone sounds.
button 2 for about five seconds until a tone sounds. To activate: press and hold button 2 for about five seconds until a tone sounds.

buttons and If you press one of the two buttons and do not hear a tone, the relevant setting has already been selected.

You can also switch the automatic locking function on and off using the on-board computer.

    See also:

    Coolant
    Important safety notes The coolant is a mixture of water and antifreeze/corrosion inhibitor. It performs the following tasks:  - corrosion protection  - antifreeze protection & ...

    Overview
    The third generation of the Mercedes-Benz M-Class sets new benchmarks in the SUV world with its leading-edge automotive technology. The new M-Class boasts optimum energy efficiency, leading standa ...

    Correct use of the seat belts
    WARNING USE SEAT BELTS PROPERLY - Seat belts can only work when used properly. Never wear seat belts in any other way than as described in this section, as that could result in serious injuri ...