200Vehicle careWheels and tyres
Wheels
On vehicles with Diesel engines no
steel rims and only special, for this
vehicle approved alloy wheels are
permitted.
Tyre condition, wheel condition
Drive over edges slowly and at right
angles if possible. Driving over sharp
edges can cause tyre and wheel
damage. Do not trap tyres on the kerb when parking.
Regularly check the wheels for
damage. Seek the assistance of a
workshop in the event of damage or
unusual wear.
Winter tyres Winter tyres improve driving safety attemperatures below 7 °C and should
therefore be fitted on all wheels.
All tyre sizes are permitted as winter
tyres 3 234.Use tyre size 225/55 R17 only as
winter tyres.
On vehicles with Diesel engines, no
steel rims and only special, vehicle-
approved alloy wheels are permitted.
In accordance with country-specific
regulations, affix the speed sticker in
the driver's field of view.
Tyre designationsE.g. 235/55 R 17 99 V235=Tyre width, mm55=Cross-section ratio (tyre
height to tyre width), %R=Belt type: RadialRF=Type: RunFlat17=Wheel diameter, inches99=Load index e.g. 99 is
equivalent to 775 kgV=Speed code letter
Speed code letter:
Q=up to 100 mphS=up to 112 mphT=up to 118 mphH=up to 130 mphV=up to 150 mphW=up to 168 mphTyre pressure
Check the pressure of cold tyres at least every 14 days and before any
long journey. Do not forget the spare
wheel. This also applies to vehicles
with tyre pressure monitoring system.
Unscrew the valve cap.
Tyre pressure 3 234.
The tyre and loading information label on the left door frame indicates the
original equipment tyres and the
correspondent tyre pressures.
The tyre pressure data refers to cold
tyres. It applies to summer and winter
tyres.
Vehicle care203
External high-power radio equipment
could disrupt the tyre pressure
monitoring system.
Each time the tyres are replaced tyre
pressure monitoring system sensors
must be dismounted and serviced. For the screwed sensor: replace
valve core and sealing ring. For
clipped sensor: replace complete
valve stem.
Vehicle loading status Adjust tyre pressure to load condition according to tyre information label or
tyre pressure chart 3 234, and select
the relevant setting in the menu Tire
Load in the Driver Information Centre,
Vehicle Information Menu 3 94.
Select:
■ Light for comfort pressure up to
3 people
■ Eco for Eco pressure up to
3 people
■ Max for full loading
Auto learn function After changing wheels, the vehicle
must be stationary for approx.
20 minutes, before the system
recalculates. The following relearn
process takes up to 10 minutes of
driving with a minimum speed of
12 mph. In this case, $ can be
displayed or pressure values can
swap in the Driver Information Centre.
If problems occur during the relearn
process, a warning message is
displayed in the Driver Information
Centre.
Temperature dependency
Tyre pressure depends on the
temperature of the tyre. During
driving, tyre temperature and
pressure increase.
The tyre pressure value displayed in
the Driver Information Centre shows
the actual tyre pressure. Therefore it
is important to check tyre pressure
with cold tyres.
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).
Vehicle care211
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 Some vehicles are equipped with a
tyre repair kit instead of a 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.Caution
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.
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 spare wheel.
To remove: 1. Close the soft top and fold in the load compartment partition by
pushing at the loop area upwards
to the inside 3 71.
Vehicle care213
9. Insert the strap through thespokes 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. Deposit the floor cover on the wheel.
13. If equipped, secure coupling ball bar in the bag at 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, untwist and remove wing nut and conus.
3. Stow the tools in the tool box and the bag.
4. Place spare wheel outside up in the well.
5. Insert and turn the excentricconus in the recess of the spare
wheel so that the wheel is
positioned as far as possible to
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 fixed properly. During a sudden stop or a collision, loose
equipment could strike someone.
Store jack and tools always in the
respective storage compartments
and secure them by fixing.
Damaged wheel placed in the load
compartment must always be
secured by the strap.
Temporary spare wheel
Caution
The use of a spare wheel that is smaller than the other wheels or in combination with winter tyres
Vehicle care219
Polishing and waxingWax painted parts of the vehicle
regularly (at the latest when water no
longer beads). Otherwise, the
paintwork will dry out.
Polishing is necessary only if the paint
has become dull or if solid deposits
have become attached to it.
Paintwork polish with silicone forms a protective film, making waxing
unnecessary.
Soft top as well as plastic body parts
must not be treated with wax or
polishing agents.
Windows and windscreen wiper
blades
Use a soft lint-free cloth or chamois
leather together with window cleaner
and insect remover.
When cleaning the rear window from
inside, always wipe in parallel to the
heating element to prevent damage.For mechanical removal of ice, use a
sharp-edged ice scraper. Press the
scraper firmly against the glass so
that no dirt can get under it and
scratch the glass.
Clean smearing wiper blades with a
soft cloth and window cleaner.
Wheels and tyres
Do not use high-pressure jet
cleaners.
Clean rims with a pH-neutral wheel
cleaner.
Rims are painted and can be treated
with the same agents as the body.
Paintwork damageRectify minor paintwork damage with
a touch-up pen before rust forms. Have more extensive damage or rust areas repaired by a workshop.
Underbody Some areas of the vehicle underbody
have a PVC undercoating while other
critical areas have a durable
protective wax coating.After the underbody is washed, check the underbody and have it waxed if
necessary.
Bitumen/rubber materials could
damage the PVC coating. Have
underbody work carried out by a
workshop.
Before and after winter, wash the
underbody and have the protective
wax coating checked.
Towing equipment Do not clean the coupling ball bar with
a steam-jet or high-pressure jet
cleaner.
Interior care Interior and upholsteryOnly clean the vehicle interior,
including the instrument panel fascia
and panelling, with a dry cloth or
interior cleaner.
Clean the leather upholstery with
clear water and a soft cloth. In case of
heavy soiling, use leather care.
244
Upshift.......................................... 91
Using this manual ..........................3
V Vehicle battery ........................... 182
Vehicle checks............................ 178
Vehicle data ................................ 226
Vehicle data recording and privacy ..................................... 238
Vehicle detected ahead ................93
Vehicle dimensions .................... 231
Vehicle Identification Number ....224
Vehicle jack ................................ 199
Vehicle messages .....................100
Vehicle personalisation .............102
Vehicle security ............................ 25
Vehicle specific data ......................3
Vehicle storage ........................... 177
Vehicle tools ............................... 199
Vehicle unlocking ........................... 6
Vehicle weight ........................... 231
Ventilating ..................................... 52
Ventilation ................................... 121
W
Warning chimes .........................101
Warning lights ............................... 83
Warning triangle .......................... 74
Washer and wiper systems .........14
Washer fluid ............................... 182Wheel changing .........................208
Wheel covers ............................. 204
Wheels and tyres .......................200
Wind deflector............................... 40
Windows ....................................... 30
Windscreen................................... 30 Windscreen wiper/washer ...........78
Winter tyres ............................... 200
Wiper blade replacement ..........184