250Wheels and tyres
Wear indicators
The original tyres on your vehicle have 1.6 mm high “tread wear indicators”
⇒ fig. 172, running across the tread. Depending on the make, there will be
6 to 8 of them evenly spaced around the tyre. Markings on the tyre sidewall
(for instance the letters “TWI” or other symbols) indicate the positions of
the tread wear indicators. The minimum tread depth required by law is
1.6 mm (measured in the tread grooves next to the tread wear indicators).
Worn tyres must be replaced. Different figures may apply in export countries
⇒
.
Tyre pressure
Incorrect tyre pressure causes premature wear and could cause tyre blow-
out. For this reason, the tyre pressure should be checked at least once per
month ⇒ page 247.
Driving style
Fast cornering, heavy acceleration and hard braking all increase tyre wear.
Changing wheels around
If the front tyres are worn considerably more than the rear ones it is advisa-
ble to change them around as shown ⇒ fig. 173. All the tyres will then last
for about the same time.
Wheel balance
The wheels on new vehicles are balanced. However, various factors encoun-
tered in normal driving can cause them to become unbalanced, which re-
sults in steering vibration.
Unbalanced wheels should be rebalanced, as they otherwise cause exces-
sive wear on steering, suspension and tyres. A wheel must also be reba-
lanced when a new tyre is fitted. Incorrect wheel alignment
Incorrect wheel alignment causes excessive tyre wear, impairing the safety
of the vehicle. If tyres show excessive wear, you should have the wheel
alignment checked by an Authorised Service Centre.
WARNING
There is a serious danger of accidents if a tyre bursts during driving!
● The tyres must be replaced at the latest when the tread wear indica-
tors are worn ⇒ page 250. Failure to do so could result in an accident.
Worn tyres do not grip well at high speeds on wet roads. There is also a
greater risk of aquaplaning.
● At continuously high speeds, a tyre with insufficient pressure flexes
more. This causes it to overheat. This can cause tread separation and tyre
blow-out. Risk of accident. Always observe the recommended tyre pres-
sures.
● If tyres show excessive wear, you should have the running gear
checked by an Authorised Service Centre.
● Keep chemicals such as oil, fuel and brake fluid away from tyres.
● Damaged wheels and tyres must be replaced immediately!
For the sake of the environment
Under-inflated tyres will increase fuel consumption.
287
Technical specifications
Technical specifications
Checking fluid levels
From time to time, the levels of the different fluids in the ve-
hicle must be checked. Never fill with incorrect fluids, other-
wise serious damage to the engine may be caused.
Fig. 207 Diagram for the
location of the various el-
ements
Coolant expansion tank
Windscreen washer fluid reservoir
Engine oil filler cap
Engine oil dipstick
Brake fluid reservoir
Vehicle battery (underneath the cover)
The checking and refilling of service fluids are carried out on the compo-
nents mentioned above. These operations are described in the ⇒ page 230.
1
23456
Overview
You will find further explanations, instructions and restrictions on the tech-
nical specifications as of
⇒ page 283.
Safety FirstOperating InstructionsPractical TipsTechnical Specifications
Index
A
ABS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195Warning lamp . . . . . . . . . . . . . . . . . . . . . . . . 84
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221
Acoustic signal . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Acoustic warning . . . . . . . . . . . . . . . . . . . . . . . 171
Adaptive headlights . . . . . . . . . . . . . . . . . . . . . 120
Adjusting the seat belt height . . . . . . . . . . . . . . 28
AFS (cornering lights) . . . . . . . . . . . . . . . . . . . 121
Airbag covers . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Airbag system . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Curtain airbags . . . . . . . . . . . . . . . . . . . . . . . 41
Front airbags . . . . . . . . . . . . . . . . . . . . . . . . 34
Side airbags . . . . . . . . . . . . . . . . . . . . . . . . . 38
Warning lamp . . . . . . . . . . . . . . . . . . . . . . . . 32
Air conditioner 2C-Climatronic . . . . . . . . . . . . . . . . . . . . . . 163
General notes . . . . . . . . . . . . . . . . . . . . . . . 167
Air conditioner automatic mode 2C-Climatronic . . . . . . . . . . . . . . . . . . . . . . 165
Air conditioning . . . . . . . . . . . . . . . . . . . . . . . . 159
Air recirculation mode 2C-Climatronic . . . . . . . . . . . . . . . . . . . . . . 167
Manual air conditioner . . . . . . . . . . . . . . . . 161
Alarm system Switching off . . . . . . . . . . . . . . . . . . . . . . . . 107
All-wheel drive . . . . . . . . . . . . . . . . . . . . . . . . . 198 Alternator
Warning lamp . . . . . . . . . . . . . . . . . . . . . . . . 85
Anti-freeze . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237
Anti-lock brake system . . . . . . . . . . . . . . . . . . . 195 Warning lamp . . . . . . . . . . . . . . . . . . . . . . . . 84
Anti-theft alarm system . . . . . . . . . . . . . . . . . . 107 Switching off . . . . . . . . . . . . . . . . . . . . . . . . 107
Anti-theft wheel bolts . . . . . . . . . . . . . . . . . . . 259
Aquaplaning . . . . . . . . . . . . . . . . . . . . . . . . . . . 250
Ashtray . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
Aspects to note before setting off . . . . . . . . . . . . 8
ASR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195 Warning lamp . . . . . . . . . . . . . . . . . . . . . . . . 89
Automatic anti-dazzle interior mirror Activating the anti-dazzle function . . . . . . 132
Deactivating the anti-dazzle function . . . . 132
Automatic car wash tunnel . . . . . . . . . . . . . . . 213
Automatic gearbox Kick-down feature . . . . . . . . . . . . . . . . . . . . 184
Automatic gearbox/DSG automatic gearbox . 180
Automatic lighting . . . . . . . . . . . . . . . . . . . . . . 117
Automatic windscreeen wiper/washer . . . . . . 128
Auxiliary audio input: AUX-IN . . . . . . . . . . . . . 152
B
Ball coupling . . . . . . . . . . . . . . . . . . . . . . . . . . . 209 Battery
Changing . . . . . . . . . . . . . . . . . . . . . . . . . . 245
Charging . . . . . . . . . . . . . . . . . . . . . . . . . . . 245
Winter conditions . . . . . . . . . . . . . . . . . . . . 243
Before setting off . . . . . . . . . . . . . . . . . . . . . . . . . 8
Biodiesel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229
Biodiesel fuel . . . . . . . . . . . . . . . . . . . . . . . . . . 229
Bonnet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232
Brake fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242 Changing . . . . . . . . . . . . . . . . . . . . . . . . . . 243
Warning lamp . . . . . . . . . . . . . . . . . . . . . . . . 66
Brake pads . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202
Brake pedal warning lamp . . . . . . . . . . . . . . . . . . . . . . . . 90
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202 Worn brake pads . . . . . . . . . . . . . . . . . . . . . 85
Brake servo . . . . . . . . . . . . . . . . . . . . . . . . 194, 202
Brake system . . . . . . . . . . . . . . . . . . . . . . . . . . 242 Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199
Brake servo . . . . . . . . . . . . . . . . . . . . . . . . . 199
Warning lamp . . . . . . . . . . . . . . . . . . . . . . . . 86
Braking distance . . . . . . . . . . . . . . . . . . . . . . . 202
Bulb changes General notes . . . . . . . . . . . . . . . . . . . . . . . 268
Bulb defect Warning lamp . . . . . . . . . . . . . . . . . . . . . . . . 87
Buzzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123, 171
301
Index