
X
Read the tire pressure and compare it with
the recommended value on the loading
information table or th etire pressure table
(Y page 278).
X If the tire pressure is too low, increase it to
the recommended value.
X If the tire pressure is too high, release air
by pressing down the metal pin in the valve.
Use the tip of a pen, for example. Then,
chec kthe tire pressure again using the tire
pressure gauge.
X Screw the valve cap onto the valve.
X Repeatt he steps for the other tires. Tire pressure monitor
Important safety notes G
WARNING
Each tire, including the spare (if provided),
should be checked at least once a month
when cold and inflated to the pressure
recommended by the vehicle manufacturer
on the Tire and Loading Information placard
on the driver's door B-pillar or the tire
pressure label on the inside of the fuel filler
flap. If your vehicle has tires of a different size
than the size indicated on the Tire and Loading
Information placard or the tire pressure label,
you should determine the proper tire pressure
for those tires.
As an added safety feature, your vehicle has
been equipped with a tire pressure monitoring
system (TPMS) that illuminates a low tire
pressure telltale when one or more of your
tires are significantly underinflated.
Accordingly, when the low tire pressure
telltale illuminates, you should stop and check
your tires as soon as possible, and inflate
them to the proper pressure. Driving on a
significantly underinflated tire causes the tire
to overheat and can lead to tire failure.
Underinflation also reduces fuel efficiency
and tire tread life, and may affect the vehicle's
handling and stopping ability. Please note that the TPMS is not a substitute
for proper tire maintenance, and it is the
driver's responsibility to maintain correct tire
pressure, even if underinflation has not
reached the level to trigger illumination of the
TPMS low tire pressure telltale.
USA only:
Your vehicle has also been equipped with a
TPMS malfunction indicator to indicate if the
system is not operating properly. The TPMS
malfunction indicator is combined with the
low tire pressure telltale. When the system
detects a malfunction, the warning lamp will
flash for approximately a minute and then
remain continuously illuminated. This
sequence will be repeated every time the
vehicle is started as long as the malfunction
exists.
When the malfunction indicator is illuminated,
the system may not be able to detect or signal
low tire pressure as intended. TPMS
malfunctions may occur for a variety of
reasons, including the installation of
incompatible replacement or alternate tires
or wheels on the vehicle that prevent the
TPMS from functioning properly. Always
check the TPMS malfunction telltale after
replacing one or more tires or wheels on your
vehicle to ensure that the replacement or
alternate tires and wheels allow the TPMS to
continue to function properly.
Vehicles with a tire pressure monitor are
equipped with sensors in the wheels that
monitor the tire pressure of all four tires. The
tire pressure monitor monitors the pressure
in all four tires; you set this pressure when
you activate the tire pressure monitor. The
tire pressure monitor warns you when the
pressure drops in one or more of the tires. The
tire pressure monitor only functions if the
corresponding sensors are installed to all
wheels.
You should always adjust the tire pressure
according to the vehicle load. Restart the tire
pressure monitor if you change the tire
pressure. Tire pressure
281Wheels and tires Z

The tire pressure monitor does not warn you
if a tire pressure is incorrect. Observe the
notes on the recommended tire pressure
(Y page 278).
The tire pressure monitor is not able to warn
you of a sudden loss of pressure, e.g.
following penetration by a foreign object .In
this event, brake the vehicle until it comes to
a standstill. Do not carry ou tany sudden
steering maneuvers.
The tire pressure monitor has a yellow 000A
warning lamp in the instrument cluster for
indicating pressure loss/malfunctions (USA)
or pressure loss (Canada). Depending on how
the warning lamp flashes or lights up, an
underinflated tire or a malfunction in the tire
pressure monitor is displayed:
R if the 000A warning lamp is li tcontinuously,
the tire pressure on one or more tires is
significantly too low. The tire pressure
monitor is not malfunctioning.
R USA only: if the 000Awarning lamp flashes
for 60 seconds and then remains lit
constantly, the tire pressure monitor is
malfunctioning.
Only vehicles with steerin gwheel buttons: the
on-board computer displays information on
tire pressure. After a few minutes of driving,
the current tire pressure of each tire is shown
in the on-board computer.
USA only: if the tire pressure monitor is
malfunctioning, it may be more than
10 minutes before the malfunction is shown.
The 000A tire pressure warning lamp flashes
for 60 seconds and then remains lit. When the
malfunction has been rectified, the 000Atire
pressure warning lamp goes out after a few
minutes of driving.
The tire pressure values indicated by the on-
board computer may differ from those
measured at a gas station with a pressure
gauge. The tire pressures shown by the on-
board computer refer to those measured at
sea level. At high altitudes, the tire pressure
value indicated by a pressure gauge are
higher than those shown by the on-board computer. In this case, do not reduce the tire
pressures.
If radio transmitting equipment (e.g. wireless
headphones, two-way radios) is operated
inside the vehicle or in the vicinity of the
vehicle, this can interfere with the operation
of the tire pressure monitor.
Checking the tire pressure
electronically (vehicles with steering
wheel buttons)
Tire pressure display
Using the steering wheel buttons
X
Turn the key to position 2in the ignition
lock.
X Press the 0010or0007 button repeatedly
until the standard display is shown
(Y page 182).
X Press the 0001or0009 button repeatedly
until the current pressure of the individual
tires is shown in the display.
If the vehicle is parked for longer than
20 minutes or you then drive at less than
18 mph (30 km/h), the Tire pres.displayed after driving for
several minutes message appears.
i The tire pressure value shown in the
display may differ from those measured at
a gas station using a pressure gauge. The
on-board computer will generally give you
a more exact value.
Tire pressure loss warning system Vehicles with steering wheel buttons
If the tire pressure monitor detects a
significant pressure loss on one or more tires,
the on-board computer displays a warning282
Tire pressureWheels and tires

Traction
Traction is the result of friction between the
tires and the road surface.
TWR (permissible trailer drawbar load)
The TWR is the maximu mpermissible weight
that may act on the ball coupling of the trailer
tow hitch.
Wear indicator
Narrow bars (tread wear bars) that are
distributed over the tire tread. If the tire tread
is level with the bars, the wear limit of 000Bin
(1.6 mm) has been reached.
Distribution of the vehicle occupants
The distribution of vehicle occupants over
designated seat positions in avehicle.
Maximum permissible payload weight
Nominal load and goods/luggage load plus
68 kg (150 lbs) multiplied by the number of
seats in the vehicle. Flat tire
General notes
Your vehicle may be equipped with Premium
tire sealant or with a spare wheel. The spare
wheel is under the vehicle at the rear
(Y page 308). The Premium tire sealant is
located in the stowage compartment in the
right-hand door sill (Y page 264).
You can find information on changing/
mounting wheels in the "Wheel change"
section (Y page 303).
When you replace a tire, we recommend that
you also replace the tire valve. Please observe
the safety-relevant information on tire valve
(Y page 280). Vehicle preparation
X Stop the vehicle as far away as possible
from traffic and on a level, firm and non-slip
surface.
X Switch on the hazard warning lamps if the
vehicle poses a hazard to passing vehicles.
X Turn the fron twheels to the straight-ahead
position.
X Move the selector lever of the automatic
transmission to position P.
X Switch off the engine.
X Passengers should leave the vehicle. Make
sure that the passengers are not
endangered as they do so.
X 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 Place the warning triangle or warning lamp
at a suitable distance.
Observe legal requirements. Using Premium tire sealant
Using Premium tire sealant You can use Premium tire sealant to seal
punctures of up to 0.23 in (6 mm), particularly
those in the tire tread. Tire sealant can be
used at outside temperatures down to
002722 ‡ (002730 †).
G
WARNING
In the following situations, the tire sealant is
unable to provide sufficient breakdown
assistance, as it is unable to seal the tire
properly:
R there are cuts or punctures in the tire larger
than those mentioned above.
R the wheel rim is damaged.
R you have driven at very low tire pressures
or on a flat tire.
There is a risk of an accident. Flat tire
295Wheels and tires
Z

Do not drive any further. Contact a qualified
specialis tworkshop. G
WARNING
The tire sealant is harmful and causes
irritation. It must not come into contact with
your skin, eyes or clothing or be swallowed.
Do not inhale TIREFIT fumes. Keep tire sealant
away from children. There is a risk of injury.
If you come into contact with the tire sealant,
observe the following:
R Rinse off the tire sealant from your skin
immediately with water.
R If the tire sealant comes into contact with
your eyes, immediately rinse them
thoroughly with clean water.
R If tire sealant is swallowed, immediately
rinse your mouth out thoroughly and drink
plenty of water. Do not induce vomiting,
and seek medical attention immediately.
R Immediately change out of clothing which
has come into contact with tire sealant.
R If an allergic reaction occurs, seek medical
attention immediately.
In addition, observe the manufacturer's
safety instructions on the sticker on the tire
inflation compressor and on the sticker on the
tire sealant bottle.
The tire sealant is water-soluble. If tire sealant
escapes, you can wash it off with water.
i Have the tire sealant replaced every
8y ears at a qualified specialist workshop.
! The tire inflation compressor should only
be connected to the 12 V socket in the
center console. You may otherwise
damage the vehicle's electrics.
! Do not operate the tire inflation
compressor for longer than 20 minutes at
a time without a break. The tire inflation
compressor may otherwise overheat.
The tire inflation compressor can be
operated again once it has cooled down. H
Environmental note
Have the used tire sealant bottle disposed of
professionally, e.g. at aqualified specialist
workshop.
X Prepare the vehicle as described
(Y page 295).
X If possible, remove the foreign object that
has pierced the tire, e.g .the screw or the
nail.
It is beneficial to the sealing process if the
foreign body that has pierced the tire is
removed.
X Remove the Premium tire sealant, the
accompanying
"max 50 mph"("max80 km/h") sticker and
the tire inflation compressor from the
stowage compartmentint he right-hand
doorway (Y page 264).
X Affix the sticker within the driver's field of
vision. Tire inflation compressor
0005
Switch
0006 Angled connecting piece
0026 Tire inflation compressor hose
0025 Flap
0023 Pressure gauge with pressure release
screw
0024 Connector with cable
X Open flap 0025on the tire inflation
compressor.
X Pull connector 0024and hose 0026with
pressure gauge 0023from the housing. 296
Flat tireWheels and tires

Tire sealant bottle for single tires
0018
Valve
0019 Tire sealant bottle with hook, hose and
valve core extractor Tire sealant bottle for twin tires
0018
Valve
0019 Tire sealant bottle with hook, hose and
angled connecting piece
X Shake tire sealant bottle 0019.
X Unscrew and remove the cap from valve
0018 of tire sealant bottle 0019.
X Push angled valve adapter 0006located on
hose 0026of the tire inflation compressor as
far as it will go ontov alve0018of tire sealant
bottle 0019and fix it in place.
The following steps differ depending on the
vehicle tires.
R Single tire
R Twin tires, inner wheel
R Twin tires, outer wheel Single tire
X
Pull knob 001Bout of valve core extractor
001D as far as it will go.
X Remove the cap from valve 001Eon the
defective tire.
X Hang tire sealan tbottle 0019in the
uppermost wheel ventilation hole using
hook 001A.
X Keep pressing lever 001C, place valve core
extractor 001Dfirmly onto tire valve 001Eand
then release lever 001C.
X Press knob 001Binto the valve core of valve
001E, turning it gently as you do so, until the
shaft of valve core extractor 001Dengages.
X Turn knob 001Bcounter-clockwise until the
valve core is unscrewed.
X Pull knob 001Bout of valve core extractor
001D as far as it will go.
This pulls the valve core into valve core
extractor 001Dand seals it against valve core
extractor stop 001D.
X Make sure that the pressure release screw
on pressure gauge 0023is closed.
X Connect connector 0024to the 12 V socket
(12 V, 25 A, 300 W) on the center console
(Y page 228).
X Start the engine.
X Press switch 0005on the tire inflation
compressor to I.
The tire inflation compressor is activated.
The tire sealant is then pumped into the tire
and the tire pressure is increased. Allow the Flat tire
297Wheels and tires Z

tire inflatio
ncompressor to run for at least
10 minutes until tire sealant bottle 0019is
completely empty and the tire pressure is
at least 300 kPa (3.0 bar/43.5 psi).
If possible, inflate the tire to the
recommended tire pressure. You will find a
table of recommended tire pressure on the
Tire and Loading Information placard 8
or
the tire pressure plate on the B-pillar on the
driver's side of the vehicle ( Ypage 278).
X Then press 0on tire inflation compressor
switch 0005.
The tire inflation compressor is
deactivated.
X Quickly slide knob 001Bto the stop in valve
core extractor 001D.
X Turn knob 001Bclockwise until the valve core
is firmly screwed into tire valve 001E.
i Do not pull valve core extractor 001Doff tire
valve 001Ewhile the valve core is unscrewed
from tire valve 001E.The tire sealant could
otherwise run out and get on your skin or
clothes.
X Press lever 001Cand pull valve core extractor
001D from tire valve 001E.
X Screw the valve cap onto tire valve 001E.
X Observe the following notes and
instructions:
R
Tire pressure of 300 kPa (3.0 bar/
43.5 psi) not reached (Y page 301).
R Tire pressure of 300 kPa (3.0 bar/
43.5 psi) reached (Y page 301). Twin tires, inner wheel X
Unscrew the valve cap from valve
extension 001Aon the defective wheel.
X Screw valve core extractor 001Bclockwise as
far as it will go onto valve extension 001A.
X Screw valve core extractor 001B
approximately a further 0003turn to release
valve extension 001A.
X Unscrew valve extension 001Aand the valve
core extractor 001Bcounter-clockwise from
tire valve 001F.
X Unscrew valve extension 001Afrom valve
core extractor 001B. X
Pull knob 001Dout of valve core extractor
001B as far as it will go.
X Screw valve core extractor 001Bclockwise
onto tire valve 001F.
X Press knob 001Dinto the valve core of valve
001F, turning it gently as you do so, until the
shaft of valve core extractor 001Bengages.
8 Only for vehicles with a gross vehicle weight of less than 10,000 lbs(4,536 kg). 298
Flat tireWheels and tires

X
Turn knob 001Dcounter-clockwise until the
valve core is unscrewed.
X Pull knob 001Dout of valve core extractor
001B as far as it will go.
This pulls the valve core into valve core
extractor 001Band seals it against valve core
extractor stop 001B.
X Hang tire sealant bottle 0019in the
uppermost wheel ventilation hole 001C.
X Push angled valve adapter 001Elocated on
the hose of tire sealant filler bottle 0019as
far as it will go on to valve core extractor
001B and fix it in place.
X Make sure that the pressure release screw
on pressure gauge 0023is closed.
X Connect connector 0024to the 12 V socket
(12 V, 25 A, 300 W) on the center console
(Y page 228).
X Start the engine.
X Press switch 0005on the tire inflation
compressor to move to position I.
The tire inflation compressor is activated.
The tire sealant is then pumped into the tire
and the tire pressure is increased. Allow the
tire inflation compressor to run for at least
10 minutes until tire sealant bottle 0019is
completely empty and the tire pressure is
at least 300 kPa (3.0 bar/43.5 psi).
If possible, inflate the tire to the
recommended tire pressure. You will find a
table of recommended tire pressure on the
Tire and Loading Information placard 9
or
the tire pressure plate on the B-pillar on the
driver's side of the vehicle ( Ypage 278).
X Then press 0on tire inflation compressor
switch 0005.
The tire inflation compressor is
deactivated.
X Quickly slide knob 001Dto the stop in valve
core extractor 001B.
X Turn knob 001Dclockwise until the valve core
is firmly screwed into tire valve 001F.i
Do not pull valve core extractor 001Bfrom
tire valve 001Fwhile the valve core is
unscrewed from tire valve 001F. The tire
sealant could otherwise run out and get on
your skin or clothes.
X Pull knob 001Dout of valve core extractor
001B as far as it will go.
X Unscrew valve core extractor 001Bcounter-
clockwise from tire valve 001F.
X Screw valve extension 001Aonto tire valve
001F and tighten it.
X Screw the valve cap onto valve extension
001A.
X Observe the following notes and
instructions:
R
Tire pressure of 300 kPa (3.0 bar/
43.5 psi) not reached (Y page 301).
R Tire pressure of 300 kPa (3.0 bar/
43.5p si) reached (Y page 301).
9 Only for vehicles with a gross vehicle weight of less than 10,000 lbs(4,536 kg). Flat tire
299Wheels and tires Z

Twin tires, outer wheel
Valve tool with handle and turning piece
001A
Handle
001B Turning piece
Tire valve 001Cis located on the inne rside of
the outer wheel. It should be positioned
horizontally on the left side of the wheel for
the repair process.
X Remove the cap from valve 001Con the
defective tire.
X Guide the valve tool through the hole in the
wheel and push it onto tir evalve 001C.
X Hold handle 001Aof the valve tool with one
hand and unscrew the valv ecore with the
other hand using rotating collar 001Bof the
valve tool.
X Remove the valve tool through the gap
carefully, so that the valve core remains
engaged in the valve tool. X
Hang tire sealant bottle 0019in the upper
ventilation hole in the wheel using hook
001E.
X Push angled valve adapter 001Dlocated on
the hose of tire sealant filler bottle 0019as
far as it will go onto valve 001Cand fix it in
place.
X Make sure that the pressure release screw
on pressure gauge 0023is closed.
X Connect connector 0024to the 12 V socket
(12 V, 25 A, 300 W) on the center console
(Y page 228).
X Start the engine.
X Press switch 0005on the tire inflation
compressor to position I.
The tire inflation compressor is activated.
The tire sealant is then pumped into the tire
and the tire pressure is increased. Let the
tire inflation compressor run until tire
sealant bottle 0019is completely empty.
X After approximately 15 seconds, press 0on
tire inflation compressor switch 0005.300
Flat tireWheels and tires