Wheels and tyres
234Wheel bolts
Wheel bolts must be tightened to the correct torque.The design of wheel bolts is matched to the rims. If different wheel rims are
fitted, the correct wheel bolts with the right length and correctly shaped bolt
heads must be used. This ensures that wheels are fitted securely and that the
brake system functions correctly.
In certain circumstances, you may not use wheel bolts from a different car -
even if it is the same model ⇒page 204.
After the wheels have been changed, the tightening torque of the wheel bolts
should be checked as soon as possible with a torque wrench. ⇒ The tight-
ening torque for steel and alloy wheels is 120 Nm.
WARNING
If the wheel bolts are not tightened correctly, the wheel could become
loose while driving. Risk of accident.•
The wheel bolts must be clean and turn easily. Never apply grease or oil
to them.
•
Use only wheel bolts which belong to the wheel.
•
If the torque of the wheel bolts is to o low, they could loosen whilst the
vehicle is in motion. Risk of accident! If the tightening torque is too high,
the wheel bolts and threads could be damaged.Caution
The prescribed torque for wheel bolts for steel and alloy wheels is 120 Nm.
Winter tyres
Winter tyres will improve the vehicles handling on snow and
ice.In winter conditions winter tyres will considerably improve the vehicles
handling. The design of summer tyres (width, rubber compound, tread
pattern) gives less grip on ice and snow.
Winter tyres must be inflated to a pressure 0.2 bar higher than the pressures
specified for summer tyres (see sticker on tank flap).
Winter tyres must be fitted on all four wheels.
Information on permitted winter tyre sizes can be found in the vehicle's regis-
tration documents. Use only radial winter tyres. All tyre sizes listed in the
vehicle documentation also apply to winter tyres.
Winter tyres lose their effectiveness when the tread is worn down to a depth
of 4 mm.
The speed rating code ⇒page 232, “New tyres and wheels” determines the
following speed limits : ⇒ ⇒
Q max. 160 km/h
S max. 180 km/h
T max. 190 km/h
H max. 210 km/h
In some countries, vehicles which can exceed the speed rating of the fitted
tyre must have an appropriate sticker in the driver's field of view. These
stickers are available from your Authorised Service Centre. The legal require-
ments of each country must be followed.
Do not have winter tyres fitted for unnecessarily long periods. Vehicles with
summer tyres handle better when the roads are free of snow and ice.
If you have a flat tyre, please refer to the notes on the spare wheel
⇒ page 232, “New tyres and wheels”.
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If and when
236If and whenTools, tyre repair kit and spare wheelVehicle To ols
The vehicle onboard tools are located under the floor panel in
the luggage compartment.– Lift the cover of the luggage compartment, by pulling it up with a
finger in the fitting.
– Take the onboard tools out of the vehicle.The tool kit includes:•
Jack*
•
Hook for removing wheel covers* or hub caps*
•
Box spanner for wheel bolts*
•
Reversible screwdriver with handle (including hexagonal interior) for the
wheel bolts. The screwdriver is a combination tool.
•
To wi ng e ye
•
Adapter for the anti-theft wheel bolts*
Some of the items listed are only prov ided in certain models / model years,
or are optional extras.
WARNING
•
Do not use the hexagonal socket in the screwdriver handle to tighten
the wheel bolts as with this it is not possible to tighten the bolts to the
required torque, risk of accident.
•
The jack* supplied by the factory is only designed for changing wheels
on this model. On no account attempt to use it for lifting heavier vehicles
or other loads, risk of injury.
•
Use the jack* only on firm, level ground.
•
Never start the engine when the vehicle is on the jack, risk of accident.
•
I f wo r k is t o b e ca r r i e d o u t un d e r n ea th the vehicle, this must be secured
by suitable stands. Otherwise, there is a risk of injury.WARNING (continued)
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If and when239
Safety First
Operating instructions
Tips and Maintenance
Te c h n i c a l D a t a
After changing a wheel
After changing the wheel there are still tasks to complete.– Put the tools and jack back in the luggage compartment.
– Place the wheel with the defective tyre in the luggage compart-
ment and secure it.
– Check the tyre pressure of the newly fitted tyre as soon as
possible.
– Have the tightening torque of the wheel bolts checked as soon as possible with a torque wrench. The prescribed torque is 120 Nm.
Note•
If you notice that the wheel bolts are corroded and difficult to turn when
changing a wheel, they must be replaced before having the wheel bolt torque
checked.
•
In the interest of safety, drive at moderate speeds until the wheel bolt
torque has been checked.
Wheel trims
The wheel trims must be removed to gain access to the wheel
bolts.Removing
–Insert the extraction hook from the tools into the designated ring, located in one of the bolt hole covers of the wheel cover
⇒fig. 177.
–Pull off the hub cap .
Fig. 177 Changing the
wheel: Removing a hub
cap
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Index
308Traction control system
warning lamp . . . . . . . . . . . . . . . . . . . . . . . . . 79
Trailer turn signals Indicator lamps . . . . . . . . . . . . . . . . . . . . . . . 76
Warning lamp . . . . . . . . . . . . . . . . . . . . . . . 117
Trailer weights . . . . . . . . . . . . . . . . . . . . . . . . . . 274
Trips, checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Turn signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116 Warning lamp . . . . . . . . . . . . . . . . . . . . 76, 117
Turning on the emergency indicators . . . . . . . 115
Type plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272
Tyre Mobility-System (Tyre repair kit) . . . . . . . 237
Tyre monitor indicator . . . . . . . . . . . . . . . . . . . . . 80
Tyre pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . 228 Loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 230
Tyre pressure monitoring . . . . . . . . . . . . . . . . . 229
Tyre repair kit . . . . . . . . . . . . . . . . . . . . . . . 237, 245
Tyre-Mobility-System (Tyre repair kit) . . . . . . . 245
Tyres and wheels Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . 232
Tyres service life . . . . . . . . . . . . . . . . . . . . . . . . 230
Tyres tread depth . . . . . . . . . . . . . . . . . . . . . . . 230
Tyres with directional tread pattern . . . . . . . . . 228UUnderbody sealant . . . . . . . . . . . . . . . . . . . . . . 201
USB* connection . . . . . . . . . . . . . . . . . . . . . . . . 146
Using the Tiptronic gear system . . . . . . . . . . . . 172
VVehicle battery . . . . . . . . . . . . . . . . . . . . . . . . . 225
Vehicle data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272
Vehicle identification data . . . . . . . . . . . . . . . . 272
Vehicle identification number . . . . . . . . . . . . . 272
Vehicle paint Car care products . . . . . . . . . . . . . . . . . . . . 195
Vehicle tools Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236
Vehicle wallet storage . . . . . . . . . . . . . . . . . . . 134
Ventilation slits . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Volumetric sensor* Activation . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Deactivation . . . . . . . . . . . . . . . . . . . . . . . . 103WWarning lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Warning lamps . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Warning reportsRed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Yellow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Warning texts in the display . . . . . . . . . . . . . . . . 63
Warning triangle and first-aid kit . . . . . . . . . . . 146
Washer fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . 220
Washing by hand . . . . . . . . . . . . . . . . . . . . . . . 196
Washing the vehicle . . . . . . . . . . . . . . . . . . . . . 196
Washing with high pressure cleaners . . . . . . . 197
Water warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 Water in the windscreen washer tank . . . . . . . 220
Wear indicators . . . . . . . . . . . . . . . . . . . . . . . . . 230
Wheel bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240
Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234
Wheel change . . . . . . . . . . . . . . . . . . . . . . . . . . 238
Wheel trims . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239
Wheels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 228
Why assume the correct sitting position? . . . . . 30
Why should head restraints be correctly adjusted? . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Why wear seat belts? . . . . . . . . . . . . . . . . . . 19, 21
Why wear seatbelts? . . . . . . . . . . . . . . . . . . . . . . 30
Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Windscreen washer fluid Warning lamp . . . . . . . . . . . . . . . . . . . . . . . . 77
Windscreen wiper blades Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199
Windscreen wipers . . . . . . . . . . . . . . . . . . . . . . 121 Changing blades . . . . . . . . . . . . . . . . . . . . . 221
Changing the rear blade . . . . . . . . . . . . . . . 223
Winter driving Diesel engine . . . . . . . . . . . . . . . . . . . . . . . 211
Winter tyres . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234
Wiper/wash automatic function . . . . . . . . . . . 121
Working in the engine compartment . . . . . . . . 211
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