Mercedes-Benz GL-Class: Safety notes - Operating safety - Introduction - Mercedes-Benz GL-Class Owner's ManualMercedes-Benz GL-Class: Safety notes

WARNING Work improperly carried out on electronic 
Work improperly carried out on electronic components and associated software could cause them to cease functioning. Because the vehicle's electronic components are interconnected, any modifications made may produce an undesired effect on other systems. Electronic malfunctions could seriously impair the operating safety of your vehicle.
Contact an authorized Mercedes-Benz Center for repairs or modifications to electronic components.
Other improper work or modifications on the vehicle could also have a negative impact on the operating safety of the vehicle.
Some safety systems only function when the engine is running. You should therefore never turn off the engine while driving.

WARNING Heavy blows against the vehicle underbody or 
Heavy blows against the vehicle underbody or tires/wheels may cause serious damage and impair the operating safety of your vehicle.
Such blows can be caused, for example, by running over an obstacle, road debris or a pothole.
If you feel a sudden significant vibration or ride disturbance, or you suspect that damage to your vehicle has occurred:
turn on your hazard warning flashers.
slow down carefully.
drive with caution to an area which is a safe distance from the road.
Inspect the vehicle underbody and tires/ wheels for possible damage. If the vehicle appears unsafe, have it towed to the nearest authorized Mercedes-Benz Center or other qualified maintenance or repair facility for further inspection or repairs.

    Qualified specialist workshop
    An authorized Mercedes-Benz Center is a qualified specialist workshop. It has the necessary specialist knowledge, tools and qualifications to correctly carry out the work required on your vehicle. ...

    See also:

    Switching on the ignition
    To turn on the ignition without starting the engine. Ensure the brake pedal is not depressed, and with a valid Smart Key present in the vehicle, press the START/STOP button and hold until the warn ...

    Safety systems
    Display messages (USA only) (Canada only) The red brake system warning lamp comes on while the engine is running. A warning tone also sounds. Possible causes/consequences and ► Soluti ...

    Topping up the brake fluid
    NOTICE Brake fluid will damage painted surfaces. Soak up any spillage with an absorbent cloth immediately and wash the area with a mixture of car shampoo and water. Only use new fluid from an ...