Mercedes-Benz GL-Class: Tire pressure loss warning system(Canada only) - Tire pressure - Wheels and tires - Mercedes-Benz GL-Class Owner's ManualMercedes-Benz GL-Class: Tire pressure loss warning system(Canada only)

Important safety notes

While the vehicle is in motion, the tire pressure loss warning system monitors the set tire pressure using the rotational speed of the wheels. This enables the system to detect significant pressure loss in a tire. If the speed of rotation of a wheel changes as a result of a loss of pressure, a corresponding warning message will appear in the multifunction display.

WARNING When the multifunction display shows the 
When the multifunction display shows the message Tire Pressure Check Tires, one or more of your tires are significantly underinflated. You should stop and check your tires as soon as possible, and inflate them to the proper tire inflation pressure as indicated on the vehicle's Tire and Loading Information placard or on the tire inflation pressure label.
Driving on a significantly underinflated tire causes the tire to overheat and can lead to tire failure. Underinflation also reduces fuel efficiency and tire tread life, and may affect the vehicle's handling and stopping ability.
Each tire, including the spare, should be checked at least once a month when cold.
Inflate the tires to the recommended tire inflation pressure as specified on
the Tire and Loading Information placard on the driver's door B-pillar
or
the tire inflation pressure label located on the inside of the fuel filler flap

WARNING The tire pressure loss warning system does 
The tire pressure loss warning system does not provide a warning for wrongly selected tire inflation pressures. Always adjust tire inflation pressure according to the Tire and Loading Information placard on the driver's door B-pillar or on the tire inflation pressure label located on the inside of the fuel filler flap.
The tire pressure loss warning system does not replace regular checks of the tire inflation pressures since a gradual pressure loss in more than one tire cannot be detected by the tire pressure loss warning system.
The tire pressure loss warning system is not able to issue a warning due to a sudden dramatic loss of tire inflation pressure (e.g. tire blowout caused by a foreign object). In this case bring the vehicle to a halt by carefully applying the brakes and avoiding abrupt steering maneuvers.

The function of the tire pressure loss warning system is limited or delayed if:

snow chains are mounted to your vehicle's tires.
road conditions are wintry.
you are driving on sand or gravel.
you adopt a very sporty driving style (cornering at high speeds or driving with high rates of acceleration).
you are towing a very heavy or large trailer.
you are driving with a heavy load (in the vehicle or on the roof).

Restarting the tire pressure loss warning system

Restart the tire pressure loss warning system if you have:

changed the tire pressure
changed the wheels or tires
mount new wheels or tires

Before restarting, consult the Tire and Loading Information placard on the B-pillar on the driver's side or the tire pressure table on the inside of the fuel filler flap to ensure the tire pressure in all four tires is set correctly for the current operating conditions.

Observe the notes in the section on tire pressures.

WARNING The tire pressure loss warning system can 
The tire pressure loss warning system can only give reliable warnings if you have set the correct tire pressure.
If an incorrect tire pressure is set, these incorrect values will be monitored.
A tire with insufficient pressure results in vehicle instability when driving, thus increasing the risk of an accident.

Make sure that the SmartKey is in position 2 in the ignition lock.

Press and hold the the multifunction steering wheel until the button on the multifunction steering wheel until the standard display appears in the multifunction display.

Press the Run Flat Indicator Active Menu: RButton button until the Run Flat Indicator Active Menu: RButton message appears in the multifunction display.

Press the reset button on the instrument cluster.

The Restart Run Flat Indicator? message appears in the multifunction display.

If you wish to confirm the restart:

Press the button.

The Run Flat Indicator Restarted message appears in the multifunction display.

After a teach-in period, the tire pressure loss warning system will monitor the set tire pressures of all four tires.

If you wish to cancel the restart:

Press the or button.
or
Wait until the Restart Run Flat Indicator? message goes out.

The tire pressure values stored at the last restart will continue to be monitored.

    Checking the tire pressures
    Important safety notes WARNING   Follow recommended tire inflation pressures. Do not underinflate tires. Underinflated tires wear excessively and/or unevenly, adversely affect handling ...

    See also:

    Instrument Panel Storage
    This vehicle has an instrument panel storage area (A). To open the cover, press the button. The vehicle may have an auxiliary input jack located on the lower right side of the faceplate and for ...

    Important
    The information contained in this handbook covers all vehicle derivatives and optional equipment, some of which may not be fitted to your vehicle. Due to printing cycles, this handbook may include ...

    Tire Terminology and Definitions
    Air Pressure: The amount of air inside the tire pressing outward on each square inch of the tire. Air pressure is expressed in kPa (kilopascal) or psi (pounds per square inch). Accessory Weight: ...