Wheels and Tyres229
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
The tyre inflation pressure for tyres of the tyre size 205/50 R17, which are intended to
be used with snow chains, is identical to the tyre inflation pressure for tyres of the tyre
size 225/45 R17, see
page 228, fig. 189 .
The tyre pressure should be at the highest pressure specified for your vehicle at all
times.
The tyre inflation pressure of the emergency spare wheel R 18 is 420 kPa (4.2 bar).
Always check the inflation pressure of tyres when cold. Do not reduce the higher pres-
sure of warm tyres. Adapt the inflation pressure of the tyres accordingly if your vehicle
is carrying a significantly higher payload.
Driving style
Fast cornering, sharp acceleration and brak ing (squealing tyres) increase wear-and-
tear on your tyres.
Balancing wheels
The wheels of a new vehicle are balanced. There are a wide range of influences when
driving which may result in an imbalance and which makes themselves felt through
vibration in the steering.
You should have the wheels rebalanced si nce any imbalance increases wear-and-tear
on the steering, the suspension and tyres. A wheel must also be rebalanced when a
new tyre is fitted and each time a tyre is repaired.
Wheel alignment errors
Incorrect wheel alignment at the front and re ar will not only increase wear-and-tear on
the tyres but will also has an adverse effect on vehicle safety. Contact your specialist
garage if you notice any unusual tyre wear.
WARNING
If the inflation pressure is too low, the tyre must perform a greater flexing
work. At higher speeds the tyre will warm up as a result of this. This can result
in tread separation and even a tyre blowout.
Immediately replace the damaged rims or tyres.
Tyres which are 6 years old or more should only be fitted in exceptional
cases and when adopting an approp riately cautious style of driving.
For the sake of the environment
Tyres which are insufficiently inflated increase your fuel consumption.Wear indicatorsThe base of the tread of the original tyres has wear indicators 1.6 mm high, installed at
right angles to the direction of travel. These wear indicators are located at 6 - 8 points
depending on the make and are evenly spaced around the circumference of the tyre
fig. 190 . Markings on the walls of the tyres through the letters “TWI”, triangular
symbols or other symbols identify th e position of the wear indicators.
A remaining tread of just 1.6 mm, measured in the grooves of the tread next to the wear
indicators, means that your tyres have reached their legally permissible minimum
tread depth.
WARNING
You must have your tyres replaced with new ones at the latest when the
wear indicators have been worn down . The legally permissible minimum tread
depth should be observed.
Worn tyres do not provide the necessary adhesion to the road surface at
high speeds on wet roads. One could experience “aquaplaning” (uncontrolled
movements of the vehicle - “swimming” on a wet road surface).
Fig. 190 Tyre tread with wear indicators
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Breakdown assistance237
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
The spare wheel lies in a well under the floor covering of the luggage compartment and
is fixed in place using special screws
page 236, fig. 195 .
Before removing the spare wheel, you must take out the box with the vehicle tool kit
box page 236, fig. 194.
One should check the inflation pressure in the spare wheel (at best when generally
checking the tyre air pressures - see sign on the fuel filler flap page 228) to ensure
that the spare wheel is always ready to use.
Temporary spare wheel
A warning label displayed on the rim of the temporary spare wheel indicates that your
vehicle is equippe d with a temporary spare wheel.
Please observe the following notes when driving with a temporary spare wheel:
The warning label must not be covered after installing the wheel.
Do not drive faster than 80 km/h with this spare wheel and pay particular attention
while driving. Avoid accelerating at full throttle, sharp braking and fast cornering.
The inflation pressure for this spare wheel is identical to the inflation pressure of
the standard tyres. The temporary spare wheel R 18 must have an inflation pressure of
420 kPa (4.2 bar)!
Use this spare wheel only to reach the nearest specialist garage as it is not intended
for continuous use.
No other summer or winter tyres must be mounted on the rim of the spare wheel
R 18.
Changing a wheelPreliminary workThe following steps should be carried ou t before actually changing the wheel.
– If it is necessary to change a wheel, park the vehicle as far away as possible from
the traffic flow. The place you choose should be level.
–Have all the occupants get out. While changing a wheel, the occupants of the
vehicle should not stand on the road (e.g. behind a crash barrier).
– Apply the handbrake firmly. –Engage
1st gear or if your vehicle is fitted with an automatic gearbox, position the
selector lever into position P .
– If a trailer is coupled, uncouple it.
–Take the vehicle tool kit page 236 and the spare wheel* page 236 out of the
luggage compartment.
WARNING
If you find yourself in flowing traffic switch on the hazard warning lights
system and place the warning triangle on the side of the road at the prescribed
distance from your vehicle while observin g all national legal provisions. In this
way you are protecting not only yourself but also other road users.
Never start the engine with the vehicle si tting on the raised jack - danger of
suffering injury.Caution
If you have to change a wheel on a slope fi rst block the opposite wheel with a stone or
similar object in order to secure the vehicle from unexpectedly rolling away.
Note
Comply with the national legal regulations.Changing a wheelAlways change a wheel on a level surface as far as possible.
– Take off the full wheel trim* page 238 or the wheel trim cap page 239 or the
caps page 239.
– In the case of light alloy wheels remove the wheel trim cap page 239.
– First of all slacken the safety wheel bolt * and afterwards the other wheel bolts page 239.
– Jack up the vehicle until the wheel to be changed is clear of the ground
page 240.
– Unscrew the wheel bolts and place them on a clean surface (cloth, paper etc.).
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Breakdown assistance
238
– Take off the wheel.
– Fit on the spare wheel and ti ghten the wheel bolts slightly.
–Lower the car.
– Tighten the wheel bolts firmly, alternately and diagonally using the wheel wrench (crosswise) and last the safety wheel bolt* page 239.
– Mount the full wheel trim/wheel trim cap or the caps.
Note
All bolts must be clean and must turn easily.
You must never grease or oil the wheel bolts!
When fitting on unidirectional tyres, ensu re that the tyres rotate in the correct
direction page 228.
Subsequent stepsAfter changing the wheel, you must perform the following steps.
– Stow and attach the replaced wheel in the spare wheel well using a special screw
page 236, fig. 195 .
– Stow the vehicle tool kit in the space provided.
– Check the tyre pressure on the spare wheel just mounted as soon as possible.
– Have the tightening torque of the wheel bolts checked with a torque wrench as
soon as possible. Steel and light alloy wh eels must be tightened to a tightening
torque of 120 Nm .
– Change the damaged wheel or consult a specialist garage about possibilities for getting repairs done.
WARNING
It is necessary to observe the guidelines given on page 230 if the vehicle is
subsequently fitted with tyres which are different to those it was fitted with at
the works.
Note
If you find, when changing the wheel, that the wheel bolts are corroded and diffi-
cult to turn, the bolts must be replaced before checking the tightening torque.
Drive cautiously and only at a moderate speed to a workshop where the tightening
torque can be checked.
Full wheel trim*Pulling off– Hook the clamp found in the vehicle tool ki t into the reinforced edge of the full
wheel trim.
– Push the wheel key through the clamp, support the wheel key at the tyre and pull off the wheel trim.Installing– First press the full wheel trim onto the wheel at the valve opening provided. Then
press the full wheel trim into the wheel in such a way that its entire circumference
locks correctly in place.
Caution
Use the pressure of your hand, do not knock on the full wheel trim! Heavy knocks
mainly on the points where the full wheel trim has not been inserted into the wheel,
can result in damage to the guide and centering elements of the full wheel trim.
Check for yourself that the safety wheel bolt is located in the hole in the area of the
valve before fitting the full wheel trim onto a steel wheel which is attached with a safety
wheel bolt page 240, “Securing wheels against being stolen*”.
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Fuses and light bulbs
250No.
Power consumer
Amperes
1
Diagnostic socket, engine control unit, fuel pump relay,
fuel pump control unit
7,5
2
Control unit for ABS, ESP, switch for tyre air pressure con-
trol, brake sensor
5
3
Switch and control unit for airbag
5
4
WIV, parking light, dimming mirrors, pressure sensor, tele-
phone preinstallation
5
5
Control unit for headlamp beam adjustment and head-
light swivel, control unit for parking aid, control unit for
park assist
5
6
Instrument cluster, control unit for electromechanical
power steering, Haldex, selector lever lock, power supply
for data bus
5
7
Valve heating, air mass meter
10
8
Control unit for trailer detection
5
9
Relay for auxiliary heating
5
10
Adaptive left main headlight
10
11
Adaptive right main headlight
10
12
Not assigned
13
Diagnostic socket, light switch, rain sensor, clock
7,5
14
Central locking system and bonnet lid
15
15
Central control unit - interior lights
7,5
16
Air conditioning system
7,5
17
Not assigned
18
Not assigned
19
Not assigned
20
KESSY
5
21
KESSY ELV
7,5
22
Air blower for Climatronic
40
23
Front power window, central locking of the front doors
30
24
Selector lever lock
5
25
Rear window heater, relay for auxiliary heating and venti-
lation
30
26
Power socket in the luggage compartment
25
27
Fuel pump relay,
Fuel pump relay, control unit for fuel pump, injection
valves
15
20
28
Electric boot lid
30
29
Preparation for the aftermarket radio
5
30
Not assigned
31
Not assigned
32
Front power window, central locking system of the rear
doors
30
33
Electric sliding/tilting roof
25
34
Alarm, spare horn
5
35
front and rear lighter
25
36
Headlight cleaning system
20
37
Front seat heating
20
38
Heated rear seats
20
39
Not assigned
40
Fan air-conditioning system, re lay for auxiliary heating and
ventilation
40
41
Rear window wiper
10
42
Light switch
5
No.
Power consumer
Amperes
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Technical Data
258Gearbox code, paint number, interior eq uipment number, engine output, engine
code.
Partial description of the vehicle.
7GG, 7MB, 7MG - vehicles with DPF page 193.
Vehicle identification number (VIN)
The vehicle identification number - VIN (veh icle body number) is stamped into the
engine compartment on the right hand sh ock absorber dome. This number is also
located on a sign on the lowe r left hand edge below the windscreen (together with a
VIN bar code).
Engine number
The engine number is stam ped into the engine block.
Type plate (production plate)
It is located on the left middle pillar of the body.
Sticker on inside of fuel filler flap
The stickers are affixed to the inside of the fuel filler flap. They contain the following
data:
The prescribed types of fuel,
Ty re s i z e ,
Tyre pressure.
Fuel consumption according to the ECE standards and EU guidelinesDepending on the range of the special equipment, style of driving, traffic situation,
weather influences and vehicl e condition, the consumption values which in practice
result when using the vehicle can deviate from the indicated values.
Urban traffic
The consumption measurement in urban traffic begins with starting of the cold engine.
Afterwards the normal ur ban traffic is simulated. Non-urban traffic
For the consumption measurement in non-ur
ban traffic the vehicle, as in daily
motoring, is accelerated and braked severa l times in all gears. The vehicle speed
changes within the range from 0 to 120 km/h.
Combined traffic
The consumption value in the combined traffic consists of 37% from the value for the
urban traffic and of 63% from th e value for the non-urban traffic.
Note
Please note that the information stated in the official vehicle registration docu-
ments always takes priority.
A3A4A5s3fg.2.book Page 258 Friday, April 30, 2010 12:17 PM
Index
282
Sun . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Sun screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Switching lights on and off . . . . . . . . . . . . . . . . . . . . . 60
Switching off the engine . . . . . . . . . . . . . . . . . . . . . 123TTaking care of your vehicle . . . . . . . . . . . . . . . . . . . 205
Taking out the lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
TCS
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Telephone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145, 152
Temperature outside . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
the first 1 500 kilometres . . . . . . . . . . . . . . . . . . . . . 195
The roof luggage rack system . . . . . . . . . . . . . . . . . . . 97
Thickness of brake pads Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Through-loading bag . . . . . . . . . . . . . . . . . . . . . . . . 106
Tilting roof . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Tiptronic automatic gearbox DSG . . . . . . . . . . . . . . . . . . 139
Tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236
Top Tether . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186
Towing a trailer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202
Towing device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204
Towing protection monitoring . . . . . . . . . . . . . . . . . . 51
towing vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242
Tow-starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242
Tow-starting and towing vehicle Automatic gearbox . . . . . . . . . . . . . . . . . . . . . . . 140
Traction control system . . . . . . . . . . . . . . . . . . . . . . 188 Traction control system (TCS)
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Trailer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202 General Maintenance . . . . . . . . . . . . . . . . . . . . 202
Transporting children . . . . . . . . . . . . . . . . . . . . . . . . 180
Tread depth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229
Turn signal lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Twindoor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Two-way radio systems . . . . . . . . . . . . . . . . . . . . . . 145
Tyre . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 228
Tyre inflation pressure Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Tyre repair kit Tyre repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236
Tyres Winter tyres . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232
UUnderbody protection . . . . . . . . . . . . . . . . . . . . . . . 209
Unlocking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38Remote control . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Uphill Start Assist . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192VVanity mirror . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Vehicle tool kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236
Ventilation Auxiliary ventilation . . . . . . . . . . . . . . . . . . . . . . 117
Visors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
WWarning lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Warning symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Warning triangle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235
Washing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205 with a high-pressure cleaner . . . . . . . . . . . . . . 206
Washing the vehicle . . . . . . . . . . . . . . . . . . . . . . . . . 205
Washing vehicle by hand . . . . . . . . . . . . . . . . . . . . . 206
Wax treatment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206
Wheel Changing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237
Spare . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236
Wheel bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 231
Wheel trim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 228, 238
Wheels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 228
Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 de-icing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
Windscreen Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Windscreen heater . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Windscreen washer nozzles . . . . . . . . . . . . . . . . . . . 73
Windshield washer fluid reservoir . . . . . . . . . . . . . 226 Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Windshield washer system . . . . . . . . . . . . . . . . . . . 226
Windshield wiper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Winter tyres . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232
Wiper blades Replacing the wiper blades . . . . . . . . . . . . . . . . . 76XXenon headlights . . . . . . . . . . . . . . . . . . . . . . . . . . . . 251
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