Mercedes-Benz GL-Class: Notes on driving - Operation - Wheels and tires - Mercedes-Benz GL-Class Owner's ManualMercedes-Benz GL-Class: Notes on driving

If the vehicle is heavily laden, check the tire pressures and correct them if necessary.
When parking your vehicle, make sure that the tires do not get deformed by the curb or other obstacles. If it is necessary to drive over curbs, speed humps or similar elevations, try to do so slowly and at an obtuse angle. Otherwise, the tires, particularly the sidewalls, can get damaged.

    Operation
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    Notes on regularly inspecting wheelsand tires
    WARNING   Regularly check the tires for damage. Damaged tires can cause tire inflation pressure loss. As a result, you could lose control of your vehicle. Worn, old tires can cause acci ...

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    Air bag (Amber)
    Illuminates as a bulb check when the ignition is switched on and extinguishes when the engine is started. If the lamp illuminates when driving, there is a fault with the air bag system. Seek qu ...

    System fault
    If a fault is detected in the HDC system, HDC FAULT SYSTEM NOT AVAILABLE will appear in the message center. If the fault is detected while the system is operating, HDC assistance will fade out. ...

    Tachometer
    The tachometer displays the engine speed in revolutions per minute (rpm). ...