Mercedes-Benz GL-Class: Preparing the vehicle - Changing a wheel and mounting thespare wheel - Flat tire - Breakdown assistance - Mercedes-Benz GL-Class Owner's ManualMercedes-Benz GL-Class: Preparing the vehicle

WARNING The wheel and tire size of the emergency 
The wheel and tire size of the emergency spare wheel/spare wheel may differ to that of the damaged wheel. When using an emergency spare wheel/spare wheel the handling characteristics of the vehicle may change.
Adapt your style of driving accordingly.
Never operate the vehicle with more than one emergency spare wheel/spare wheel that differs in size.
Only use an emergency spare wheel/spare wheel of a differing size briefly and do not switch off ESP®.
When using an emergency spare wheel, you must not exceed the maximum speed of 50 mph (80 km/h).

WARNING Have the emergency spare wheel/spare 
Have the emergency spare wheel/spare wheel replaced with a new wheel as soon as possible at a qualified specialist workshop which has the necessary specialist knowledge and tools to carry out the work required.
Mercedes-Benz recommends that you use an authorized Mercedes-Benz Center for this purpose. In particular, work relevant to safety or on safety-related systems must be carried out at a qualified specialist workshop.

emergency spare wheel are not equipped Vehicles without a spare wheel/ emergency spare wheel are not equipped with a tire-change tool kit at the factory. For more information on which tools are required to perform a wheel change on your vehicle, e.g. wheel chock, lug wrench or alignment bolt, consult an authorized Mercedes-Benz Center.

Prepare the vehicle as described.
If a trailer is coupled to the vehicle, uncouple it.
Remove the following items (depending on the vehicle's equipment) from the stowage well under the trunk floor:

the emergency spare wheel
the lug wrench
the folding wheel chock
the jack
the ratchet wrench
the alignment bolt
the wheel bolts for the emergency spare wheel

Secure the vehicle to prevent it from rolling away.

    Securing the vehicle to prevent it fromrolling away
    WARNING   Only jack up the vehicle on level ground or on slight inclines/declines. The vehicle could otherwise fall off the jack and injure you or others. If your vehicle is equipped wi ...

    See also:

    Tire Pressure Monitoring System (TPMS)
    Each tire, including the spare (if provided), should be checked monthly when cold and inflated to the inflation pressure recommended by the vehicle manufacturer on the vehicle placard or tire ...

    Cruise Control Light
    This light comes on whenever the cruise control is set. The light goes out when the cruise control is turned off. See Cruise Control  for more information. ...

    Heated and Cooled Cupholders
    For vehicles with heated and cooled cupholders, these are located in the front center console. Press down on the access door release button to open the cupholder door. To set to cool mode, press ...