Mersedes SUV Manuals

MOExtended tires (tires with run-flat properties)

Mercedes-Benz GL-Class / Mercedes-Benz GL-Class Owners Manual / Breakdown assistance / Flat tire / MOExtended tires (tires with run-flat properties)

General notes

With MOExtended tires (tires with run flat characteristics), you can continue to drive your vehicle even if there is a total loss of pressure in one or more tires. The affected tire must not show any clearly visible damage.

You can recognize MOExtended tires by the MOExtended marking which appears on the sidewall of the tire. You will find this marking next to the tire size designation, the loadbearing capacity and the speed index  .

MOExtended tires may only be used in conjunction with an active tire pressure loss warning system or with an active tire pressure monitor.

If the pressure loss warning message appears in the multifunction display:

R Observe the instructions in the display messages  .

Х Check the tire for damage.

Х If driving on, observe the following notes.

The maximum driving distance is approximately 50 miles (80 km) when the vehicle is partially laden and approximately 18 miles (30 km) when the vehicle is fully laden.

In addition to the vehicle load, the driving distance possible depends upon: Х speed Х road condition Х outside temperature

The driving distance possible in run-flat mode may be reduced by extreme driving conditions/maneuvers, or it can be increased through a moderate style of driving.

The maximum permissible distance which can be driven in run-flat mode is counted from the moment the tire pressure loss warning appears in the multifunction display.

You must not exceed a maximum speed of 50 mph (80 km/h).

When replacing one or all tires, make sure that you use only tires: Х of the size specified for the vehicle and Х marked "MOExtended" If a tire has gone flat and cannot be replaced with a MOExtended tire, a standard tire may be used as a temporary measure. Make sure that you use the proper size and type (summer or winter tire).

Vehicles with MOExtended tires are not equipped with a TIREFIT kit at the factory.

It is therefore recommended that you additionally equip your vehicle with a TIREFIT kit if you mount tires that do not feature run-flat properties, e.g. winter tires.

A TIREFIT kit may be obtained from a qualified specialist workshop.

Important safety notes


When driving in emergency mode, the driving characteristics deteriorate, e.g. when cornering, accelerating quickly and when braking. There is a risk of an accident.

Do not exceed the stated maximum speed.

Avoid abrupt steering and driving maneuvers, and driving over obstacles (curbs, potholes, off-road). This applies in particular to a laden vehicle.

Stop driving in emergency mode if: Х you hear banging noises.

Х the vehicle starts to shake.

Х you see smoke and smell rubber.

Х ESPЃ is intervening constantly.

Х there are tears in the sidewalls of the tire.

After driving in emergency mode, have the wheel rims checked at a qualified specialist workshop with regard to their further use. The defective tire must be replaced in every case.

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