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214Vehicle care9Warning
If the pressure is too low, this can
result in considerable tyre warm-
up and internal damage, leading to tread separation and even to tyre
blow-out at high speeds.
9 Warning
For specific tyres the
recommended tyre pressure as
shown in the tyre pressure table may exceed the maximum tyre
pressure as indicated on the tyre.
Never exceed the maximum tyre
pressure as indicated on the tyre.
If the tyre pressure must be reduced
or increased on a vehicle with tyre
pressure monitoring system, switch
off ignition. After adjusting tyre
pressure switch on ignition and select
the relevant setting on the page Tyre
load in the Driver Information Centre
3 93.
Temperature dependency
The tyre pressure depends on thetemperature of the tyre. During
driving, tyre temperature and
pressure increase. Tyre pressure
values provided on the tyre
information label and tyre pressure
chart are valid for cold tyres, which
means at 20 °C.
The pressure increases by nearly
1.5 psi for a 10 °C temperature
increase. This must be considered
when warm tyres are checked.
The tyre pressure value displayed in
the Driver Information Centre shows
the actual tyre inflation pressure. A
cooled down tyre will show a
decreased value, which does not
indicate an air leak.
Tread depth Check tread depth at regular
intervals.
Tyres should be replaced for safety
reasons at a tread depth of 2-3 mm
(4 mm for winter tyres).For safety reasons it is recommended
that the tread depth of the tyres on
one axle should not vary by more than 2 mm.
The legally permissible minimum
tread depth (1.6 mm) has been
reached when the tread has worn
down as far as one of the tread wear
indicators (TWI). Their position is
indicated by markings on the
sidewall.
If there is more wear at the front than
the rear, swap round front wheels and rear wheels periodically. Ensure that
the direction of rotation of the wheels
is the same as before.
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Vehicle care215Tyres age, even if they are not used.
We recommend tyre replacement
every 6 years.
Changing tyre and wheel size
If tyres of a different size than those
fitted at the factory are used, it may be necessary to reprogramme the
speedometer as well as the nominal
tyre pressure and make other vehicle
modifications.
After converting to a different tyre
size, have the label with tyre
pressures replaced.9 Warning
Use of unsuitable tyres or wheels
may lead to accidents and will
invalidate the vehicle type
approval.
Wheel covers
Wheel covers and tyres that are
factory approved for the respective
vehicle and comply with all of the
relevant wheel and tyre combination requirements must be used.
If the wheel covers and tyres used are
not factory approved, the tyres must
not have a rim protection ridge.
Wheel covers must not impair brake
cooling.9 Warning
Use of unsuitable tyres or wheel
covers could lead to sudden
pressure loss and thereby
accidents.
Vehicles with steel wheels: When
using locking wheel nuts, do not
attach wheel covers.
Tyre chains
Use tyre chains only on front wheels.
Always use fine mesh chains that add no more than 10 mm to the tyre tread
and the inboard sides (including chain
lock).
9 Warning
Damage may lead to tyre blowout.
Tyre chains are permitted on tyres of
sizes 225/55 R17 and 245/45 R18.
The use of tyre chains is not permitted on the temporary spare wheel.
Page 221 of 263

Vehicle care219Notice
The driving characteristics of the
repaired tyre are severely affected, therefore have this tyre replaced.
If unusual noise is heard or the
compressor becomes hot, turn
compressor off for at least
30 minutes.
The built-in safety valve opens at a
pressure of 102 psi.
Note the expiry date of the kit. After
this date its sealing capability is no
longer guaranteed. Pay attention to
storage information on sealant
bottle.
Replace the used sealant bottle. Dispose of the bottle as prescribed
by applicable laws.
The compressor and sealant can be
used from approx. -30 °C.
The adapters supplied can be used
to pump up other items e.g.
footballs, air mattresses, inflatable
dinghies etc. They are located on the underside of the compressor. To
remove, screw on compressor air
hose and withdraw adapter.Wheel changing
Some vehicles are equipped with a
tyre repair kit instead of a spare wheel
3 216.
Make the following preparations and
observe the following information:
● Park the vehicle on a level, firm and non-slippery surface. The
front wheels must be in the
straight-ahead position.
● Apply the parking brake and engage first gear, reverse gear or
P .
● Remove the spare wheel 3 221.
● Never change more than one wheel at once.
● Use the jack only to change wheels in case of puncture, not
for seasonal winter or summer
tyre change.
● The jack is maintenance-free. ● If the ground on which the vehicle
is standing is soft, a solid board
(max. 1 cm thick) should be
placed under the jack.
● Remove heavy objects from the vehicle before jacking up.● No people or animals may be inthe vehicle when it is jacked-up.
● Never crawl under a jacked-up vehicle.
● Do not start the vehicle when it is
raised on the jack.
● Clean wheel nuts and thread with
a clean cloth before mounting the wheel.9 Warning
Do not grease wheel bolt, wheel
nut and wheel nut cone.
1. Disengage wheel nut caps with a screwdriver and remove. Pull off
the wheel cover. Vehicle tools
3 208.
Alloy wheels: Disengage wheel
nut caps with a screwdriver and
remove. To protect the wheel,
place a soft cloth between the
screwdriver and the alloy wheel.
Page 222 of 263
220Vehicle care
Alloy wheels with centre wheel
bolt cap: Disengage centre cap by
inserting and pulling the extractor
3 208 in the recess of the brand
emblem.
2. Install the wheel wrench ensuring that it locates securely and loosen
each wheel nut by half a turn.
The wheels may be protected by
locking wheel nuts. To loosen
these specific nuts, first attach the adapter onto the head of the nut
before installing the wheel
wrench. The adapter is located in
the glovebox.
3. Ensure the jack is correctly positioned under the relevant
vehicle jacking point.
4. Set the jack to the necessary height. Position it directly below
the jacking point in a manner that
prevents it from slipping.
Page 223 of 263

Vehicle care221Attach wheel wrench and with thejack correctly aligned rotate
wrench until wheel is clear of the
ground.
5. Unscrew the wheel nuts. 6. Change the wheel. Spare wheel 3 221.
7. Screw on the wheel nuts.
8. Lower vehicle.
9. Install the wheel wrench ensuring that it locates securely and tighten
each nut in a crosswise
sequence. Tightening torque is
140 Nm.
10. Align the valve hole in the wheel cover with the tyre valve before
installing.
Install wheel nut caps.
Install centre cap on alloy wheels.
11. Stow the replaced wheel 3 221,
the vehicle tools 3 208 and the
adapter for the locking wheel nuts 3 68.
12. Check the tyre pressure of the installed tyre and the wheel nuttorque as soon as possible.Have the defective tyre renewed or
repaired as soon as possible.
Jacking position for lifting platform
Rear arm position of the lifting
platform centrically under the recess
of the sill.
Front arm position of the lifting
platform at the underbody.
Spare wheel If mounting a spare wheel which is
different from the other wheels, this
wheel might be classified as a
temporary spare wheel and the
corresponding speed limits apply,
even though no label indicates this.
Seek the assistance of a workshop to
check the applicable speed limit.
The spare wheel has a steel rim.
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222Vehicle careCaution
The use of a spare wheel that issmaller than the other wheels or
used in combination with winter
tyres could affect driveability.
Have the defective tyre replaced
as soon as possible.
Removing the spare wheel and
stowing a damaged wheel in the
load compartment
The spare wheel is located in the
spare wheel well beneath the floor
cover.
The spare wheel well is not designed for other tyre sizes than the spare
wheel.
To remove: 1. Close the soft top and fold in the load compartment partition by
pushing upwards at the loop area towards the inside 3 71.
2. Remove the floor cover.
3. The spare wheel is secured with a
wing nut in the well. Loosen nut, remove conus and remove the
spare wheel.
Under the spare wheel there is a box and a bag with vehicle tools.
The tool bag is secured with a
tether to the stow rod. Remove
tool box and tool bag tether from
the stow rod to access the tools in the bag. Vehicle tools 3 208.
4. Change the damaged wheel 3 219 and stow the tools back in
the tool box and the bag. Remove
the strap from the box and put
aside.
5. Attach the tool bag tether to the stow rod and place the bag in the
well. Secure the tool box by
installing the conical adapter and
tightening wing nut.
Page 225 of 263

Vehicle care2236. Stow the damaged wheel facingupwards in the well.
7. Place the loop end of the strap through the left rear lashing eye.
8. Place the hook end of the strap through the loop and pull it until
the strap is fastened securely to
the lashing eye.
9. Insert the strap through the spokes of the wheel as shown in
the illustration.
10. Mount the hook to the right rear lashing eye.
11. Tighten the strap and secure it using the buckle.
12. Place the floor cover over the damaged wheel.
13. If equipped, secure coupling ball bar in the bag to a lashing eye in
the load compartment.
14. Fold out the load compartment partition before opening the soft
top.
Stowing the spare wheel back in
the well after replacing the
damaged wheel
1. Close the soft top and fold in the load compartment partition.
2. Remove floor cover, loosen and remove wing nut and conus.
3. Stow the tools in the tool box and the bag.
4. Place spare wheel facing upwards in the well.
5. Insert and turn the excentric conus in the recess of the spare
wheel so that the wheel is
positioned as far as possible
Page 226 of 263

224Vehicle caretowards the front. Secure the
wheel by turning the wing nut
clockwise.
6. Insert and close floor cover.9 Warning
Storing a jack, a wheel or other
equipment in the load
compartment could cause injury if they are not secured properly.
During a sudden stop or a
collision, loose equipment could cause personal injury or damage
to the load or vehicle.
Always store jack and tools in the
respective storage compartments
and secure them by fixing.
Damaged wheel placed in the load compartment must always be
secured with the strap.
Temporary spare wheelCaution
The use of a spare wheel that is smaller than the other wheels or in combination with winter tyres
could affect driveability. Have the defective tyre replaced as soon as
possible.
Only mount one temporary spare
wheel. Do not drive faster than
50 mph. Take curves slowly. Do not
use for a long period of time.
If your vehicle gets a flat tyre on the
rear while towing another vehicle,
mount the temporary spare wheel at
the front and the full size tyre at the
rear.
Tyre chains 3 215.
Spare wheel with directional tyre
Fit directional tyres such that they roll in the direction of travel. The rolling
direction is indicated by a symbol
(e.g. an arrow) on the sidewall.
The following applies to tyres fitted
opposing the rolling direction:
● Driveability may be affected. Have the defective tyre renewed
or repaired as soon as possible
and fit it instead of the spare
wheel.
● Drive particularly carefully on wet
and snow-covered road
surfaces.