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X
Switch off the engine.
X
Vehicles without KEYLESS-GO: remove
the SmartKey from the ignition lock.
X
Vehicles with KEYLESS-GO start-func-
tion or KEYLESS-GO: open the driver's
door.
The vehicle electronics are now in position
g. This is the same as the SmartKey having
been removed.
X
Vehicles with KEYLESS-GO start-func-
tion or KEYLESS-GO: remove the Start/
Stop button from the ignition lock
(Y page 125).
X
Make sure that the engine cannot be started
via your smartphone (Y page 126).
X
Make sure that the passengers are not
endangered 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 bar-
rier.
X
Get out of the vehicle. Pay attention to traf-
fic conditions when doing so.
X
Close the driver's door.
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 an MOExtended tire by the
MOExtended marking which appears on the
sidewall of the tire. You will find this marking
next to the tire size designation, the load-bear-
ing capacity and the speed index
(Y page 320).
MOExtended tires may be used only in con-
junction with an activated tire pressure loss
warning system (Canada only) or tire pressure
monitor (USA only).
If a pressure loss warning message
appears in the multifunction display:
R
observe the instructions in the display mes-
sages (Y page 223).
R
check the tire for damage
R
if driving on, observe the following notes
The driving distance possible in run-flat mode
is approximately 50 miles (80 km) when the
vehicle is partially laden. When the vehicle is
fully laden it is approximately 19 miles
(30 km).
In addition to the vehicle load, the driving dis-
tance possible depends upon:
R
Vehicle speed
R
Road condition
R
Outside temperature
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 dis-
play.
You must not exceed the maximum permissi-
ble speed for limp-home mode of 50 mph
(80 km/h).
When replacing one or all tires, please observe
the following specifications for your vehicle's
tires:
R
Size
R
Type and
R
The "MOExtended" marking
If a tire has gone flat and cannot be replaced
with an 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 equipped with MOExtended tires are
not equipped with a TIREFIT kit at the factory.
It is therefore recommended that you addition-
ally equip your vehicle with a TIREFIT kit if you
mount tires that do not feature run-flat charac-
teristics, e.g. winter tires. A TIREFIT kit may be
obtained from a qualified specialist workshop.
288
Flat tire
Roadside Assistance
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