Mercedes-Benz GLS Operator's Manual page 342

Flat tire
340
If possible, bring the front wheels into the
X
straight-ahead position.
Vehicles with the AIRMATIC package:
X
make sure that the normal vehicle level is
selected ( page 190).
Y
Vehicles with the Off-Road Engineering
X
package: make sure that the normal level is
selected ( page 184).
Y
Switch off the engine.
X
Vehicles without KEYLESS-GO: remove the
X
SmartKey from the ignition lock.
Vehicles with KEYLESS-GO: open the driv-
X
er's door.
The vehicle electronics are now in position
u. This means no SmartKey is in the ignition
lock.
Vehicles with KEYLESS-GO: remove the
X
Start/Stop button from the ignition lock
( page 140).
Y
Make sure that the passengers are not endan-
X
gered as they do so. Make sure that no one is
near the danger area while a wheel is being
changed. Anyone who is not directly assisting
in the wheel change should, for example,
stand behind the barrier.
Get out of the vehicle. Pay attention to traffic
X
conditions when doing so.
Close the driver's door.
X
Unload heavy luggage.
X
i
Only operate the tire inflation compressor
using a 12 V socket, even if the ignition is
turned off (
Y
An emergency cut-out ensures that the on-
board voltage does not drop too low. If the on-
board voltage is too low, the power to the
sockets is automatically cut. This ensures
that there is sufficient power to start the
engine.
MOExtended tires (tires with run-flat
properties)
General notes
With MOExtended tires (tires with run flat char-
acteristics), you can continue to drive your vehi-
cle 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 a MOExtended tire by the
MOExtended marking which appears on the
page 312).
sidewall of the tire. You will find this marking
next to the tire size designation, the load-bear-
ing capacity and the speed index (
MOExtended tires may only be used in conjunc-
tion with an active tire pressure loss warning
system or with an active tire pressure monitor.
If a pressure loss warning message appears
in the multifunction display:
observe the instructions in the display mes-
R
sages ( page 273).
Y
check the tire for damage
R
if driving on, observe the following notes
R
The driving distance possible in run-flat mode is
approximately 50 miles (80 km) when the vehi-
cle is partially laden and approximately 18 miles
(30 km) when the vehicle is fully laden.
In addition to the vehicle load, the driving dis-
tance possible depends upon:
Vehicle speed
R
Road condition
R
Outside temperature
R
The driving distance possible in run-flat mode
may be reduced by extreme driving conditions
or maneuvers, or it can be increased through a
moderate style of driving.
The driving distance possible 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 permissible
speed of 50 mph (80 km/h).
i
When replacing one or all tires, please
observe the following specifications for your
vehicle's tires:
size
R
type and
R
the "MOExtended" mark
R
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 (sum-
mer or winter tire).
i
Vehicles equipped with MOExtended tires
are not equipped with a TIREFIT kit at the fac-
tory. 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.
page 369).
Y