See also:

System self-test
After you have switched on the ignition, the system carries out a self-diagnosis. WARNING A malfunction in the system has been detected if one of the following conditions occurs:  - ...

Raising the vehicle
WARNING When jacking up the vehicle, only use the jack which has been specifically approved by Mercedes-Benz for your vehicle. The jack is designed exclusively for jacking up the vehicle a ...

Removing and installing rear head restraints
WARNING Occupants should only travel sitting on seats which have the head restraints installed. In the event of an accident, this reduces the risk of injury for passengers seated in the rear ...