Seat belt

Display messages Possible causes/consequences and Solutions
the engine, the red seat belt warning lamp lights up for six seconds.

After starting the engine, the red seat belt warning lamp lights up for six seconds.

 The seat belt warning lamp reminds the driver and front passenger to fasten their seat belts.
  • Fasten your seat belt ().
the engine, the red seat belt warning lamp lights up. In addition, a warning

After starting the engine, the red seat belt warning lamp lights up. In addition, a warning tone sounds for up to six seconds.

 Risk of injury

The driver's seat belt is not fastened.

  • Fasten your seat belt (). The warning tone ceases.
seat belt warning lamp lights up after the engine starts, as soon as the

The red seat belt warning lamp lights up after the engine starts, as soon as the driver's or the front-passenger door is closed.

 Risk of injury The driver or front passenger has not fastened their seat belt.
  • Fasten your seat belt (). The warning lamp goes out.

There are objects on the front-passenger seat.

  • Remove the objects from the front-passenger seat and stow them in a secure place. The warning lamp goes out.
seat belt warning lamp flashes and an intermittent audible warning sounds.

The red seat belt warning lamp flashes and an intermittent audible warning sounds.

 Risk of injury

The driver or front passenger has not fastened their seat belt. In addition, you are driving faster than 15 mph (25 km/h) or you have briefly driven faster than 15 mph (25 km/h).

  • Fasten your seat belt (). The warning lamp goes out and the intermittent warning tone ceases.

There are objects on the front-passenger seat. In addition, you are driving faster than 15 mph (25 km/h) or you have briefly driven faster than 15 mph (25 km/h).

  • Remove the objects from the front-passenger seat and stow them in a secure place. The warning lamp goes out and the intermittent warning tone ceases.
    See also:

    Vehicle
    Activating/deactivating the automatic door locking feature If you select the Auto. Door Locks function, the vehicle is centrally locked above a speed of around 9 mph (15 km/h). For further in ...

    Installing the towing eye
    Vehicles with a trailer tow hitch: if possible, secure the towing device on the trailer tow hitch (). X Remove the towing eye from the vehicle tool kit (). WARNING The exhaust tail pipe may ...

    Road-simulation test rig: an ordeal for the chassis
    The road-simulation test rigs are just as punishing as the body testing facility. Applying identical load spectra over the same distance, the test engineers torture the M-Class chassis in all of i ...