Operation Manual

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Example: equipment and country-specific
variations possible.
Vehicles with alloy wheels and hub caps
On vehicles with alloy wheels and hub caps, a
socket is also provided.
Flat tire
Preparing the vehicle
Your vehicle may be equipped with:
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MOExtended tires (tires with run-flat proper-
ties) (
Y page 287)
Vehicle preparation is not necessary on vehi-
cles with MOExtended tires
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a TIREFIT kit (Y page 286)
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an emergency spare wheel (Y page 326)
Vehicles equipped 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.
Information on changing and mounting wheels
(
Y page 320).
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Stop the vehicle on solid, non-slippery and
level ground, as far away as possible from
traffic.
X
Switch on the hazard warning lamps.
X
Secure the vehicle against rolling away
(
Y page 146).
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If possible, bring the front wheels into the
straight-ahead position.
X
Vehicles with AIRMATIC: make sure that "nor-
mal" level is selected (
Y page 166).
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Switch off the engine.
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Remove the SmartKey from the ignition lock.
or, on vehicles with KEYLESS‑GO:
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Open the driver's door.
The on-board electronics now have status 0.
This is the same as the SmartKey having been
removed.
X
Remove the Start/Stop button from the igni-
tion lock (
Y page 127).
X
Make sure that the passengers are not endan-
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.
X
Get out of the vehicle. Pay attention to traffic
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 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 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 load-bear-
ing capacity and the speed index (
Y page 315).
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:
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observe the instructions in the display mes-
sages (
Y page 230).
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check the tire for damage.
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if driving on, observe the following notes.
The driving distance possible in run-flat mode is
approximately 50 miles (80 km) when the vehi-
cle 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:
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vehicle speed
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road condition
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outside temperature
The driving distance p
ossible 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 speed of
50 mph (80 km/h).
Flat tire
287
Breakdown assistance