Wheels and Tyres187
Using the systemSafetyDriving TipsGeneral MaintenanceBreakdown assistancePraktikTechnical Data
Wheels and Tyres
Wheels
General comments
•New tyres do not offer optimal grip at first and should therefore be run in for about 500 km at a moderate speed and an appropriately cautious style of driving. You will also profit from longer tyre life.
•The tread depth of new tyres may differ because of design features and the configuration of the tread (depending on the type of tyre and the manufacturer).
•Drive over curbs on the side of the road and other such obstacles slowly and, where possible, at a right angles in order to avoid damage to tyres and wheel trims.
•Inspect your tyres from time to time for damage (punctures, cuts, splits and bulges). Remove foreign bodies from the tyre profile.
•Damage to tyres and wheels is frequent ly not visible. Unusual vibrations or pulling of the vehicle to one side could be a sign of tyre damage. Please reduce your speed immediately and stop if you suspect that a wheel is damaged. Inspect the tyres for signs of damage (bulge s, splits, etc.) If no visible damage is present, please drive at an appropriatel y slow speed and carefully to the nearest specialist garage in order to have your vehicle inspected.
•Also protect your tyres from contact with oil, grease and fuel.
•Immediately replace any dust caps of the valves which have got lost.
•Mark wheels before removing them so th at their previous direction of running can be maintained when mounted them again.
•Always store wheels or tyres which been removed in a cool, dry and, where possible, dark place. Tyres which are not fixed to a wheel trim should be stored upright.
Unidirectional tyres*
The direction of rotation of the tyres is marked by arrows on the wall of the tyre. This indicates the direction of rotation of the tyre, and it is essential that the tyres are fitted on to run in this direction. Only then are the tyres able to provide the optimal properties in terms of grip, low noise, wear-and-tear and aquaplaning.
Further information concerning the use of unidirectional tyres ⇒page 191.
WARNING
•New tyres during the first 500 km do not offer optimal grip and should therefore be run appropriately - risk of accident!
•Never drive with damaged tyres - risk of accident!
Note
Please observe the various differing legal requirements regarding tyres.
Tyre life
The life of your tyres very much depends on the following points:
Tyre pressure
The working life of tyres will be shortened considerably if the tyres are insufficiently or over-inflated and this will have an adverse effect on the handling of your vehicle.
Correctly inflated tyres are of partic ular importance when travelling at high speeds. It is therefore good to check the pressure at least once a month and also before
Fig. 164 An opened fuel filler flap with the tyre inflation pressure table
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Breakdown assistance198
– Fit on the spare wheel and tighten the wheel bolts slightly.
–Lower the car.
– Tighten the wheel bolts firmly, alternately and diagonally using the
wheel wrench ⇒page 200.
– 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 187.
Subsequent steps
After changing the wheel, you must perform the following steps.
– Stow and attach the replaced wheel in the spare wheel well.
– 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. The ti ghtening torque for steel and light
alloy wheels must be 120 Nm.
– Have the defective tyre repaired as soon as possible.
WARNING
It is necessary to observe the guidelines given on ⇒page 189, “New tyres and wheels” if the vehicle is subseq uently 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 difficult to turn, the bolts must be replac ed before checking the tightening torque.
•Drive cautiously and only at a moderate speed to a workshop where the tight- ening torque can be checked.
Full wheel trim*
Pulling off
– Hook the clamp found in the vehicle tool kit into the reinforced edge
of the full wheel trim.
– Push the wheel key through the clamp, support the wheel key on the
tyre and pull off the wheel trim ⇒fig. 169.
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.
Fig. 169 Removing the full wheel trim
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Index239
Index
A
Abroad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
ABS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193
Adjusting seats . . . . . . . . . . . . . . . . . . . . . . . 54, 60, 119
Adjusting the seat backrest . . . . . . . . . . . . . . . . . . . . 58
Adjusting the steering wheel . . . . . . . . . . . . . . . . . . . 89
Air conditioning system . . . . . . . . . . . . . . . . . . . . . . . 80
Air outlet vents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Airbag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
Deployment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Front airbag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Head airbag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Side airbag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Airbag system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Alternator
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Antilock brake system . . . . . . . . . . . . . . . . . . . . . . . . 149
Antilock brake system - ABS
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Anti-theft alarm system . . . . . . . . . . . . . . . . . . . . . . . 39
Ashtray . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Auto Check Control . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Auto Computer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Automatic gearbox . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Emergency programme . . . . . . . . . . . . . . . . . . 101
Kickdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Tiptronic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Automatic vehicle wash systems . . . . . . . . . . . . . . 164
Automatic wiper/washer system . . . . . . . . . . . . . . . 50
Avoiding damage to your vehicle . . . . . . . . . . . . . 159
B
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22, 182
change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185
Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184
Inspecting the electrolyte level . . . . . . . . . . . . 184
Operation in winter . . . . . . . . . . . . . . . . . . . . . . 184
Before setting off . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
Belt tensioner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
Belt tensioners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
Belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Bicycle carrier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Bluetooth™ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Bonnet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173
Boot lid
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Brake
Handbrake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Brake booster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
Brake fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181
Brake pads
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Brake system
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
Bulbs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211
Button on the driver's door
Central locking system . . . . . . . . . . . . . . . . . . . . 35
C
Car jack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196
Car state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Catalytic converter . . . . . . . . . . . . . . . . . . . . . . . . . . 154
CD changer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Central locking system . . . . . . . . . . . . . . . . . . . . . . . . 33
lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
unlock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Changing a wheel . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
Changing the engine oil . . . . . . . . . . . . . . . . . . . . . . 178
Changing wheels around . . . . . . . . . . . . . . . . . . . . . 189
Charging the battery . . . . . . . . . . . . . . . . . . . . . . . . . 184
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Check engine oil level . . . . . . . . . . . . . . . . . . . . . . . . 177
Child safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
Side airbag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
Child safety lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
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Index240
Child safety seat
on the front passenger seat . . . . . . . . . . . . . . . 138
Safety information . . . . . . . . . . . . . . . . . . . . . . . 137
Child seat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
Classification into groups . . . . . . . . . . . . . . . . . 140
ISOFIX system . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143
Children and safety . . . . . . . . . . . . . . . . . . . . . . . . . . 137
Chrome parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
Cigarette lighter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
Climatronic
Air outlet vents . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Defrosting windows . . . . . . . . . . . . . . . . . . . . . . . 87
Recirculated air mode . . . . . . . . . . . . . . . . . . . . . 87
Setting temperature . . . . . . . . . . . . . . . . . . . . . . . 87
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Clothes hooks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Cockpit
General view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Compartments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Computer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Convenience operation . . . . . . . . . . . . . . . . . . . . . . . 42
Converting/masking over headlights . . . . . . . . . . 158
Coolant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
replenishing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Coolant level
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Coolant temperature gauge . . . . . . . . . . . . . . . . . . . 10
Coolant temperature/coolant level
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Cornering lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Correct seated position . . . . . . . . . . . . . . . . . . . . . . 119
Counter for distance driven . . . . . . . . . . . . . . . . . . . . 11
Cruise control system . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Cup holder
front . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
D
Deactivating an airbag . . . . . . . . . . . . . . . . . . . . . . . 135
Defrosting rear window . . . . . . . . . . . . . . . . . . . . . . . . 49
Defrosting windows . . . . . . . . . . . . . . . . . . . . . . . 79, 82
De-icing the windows . . . . . . . . . . . . . . . . . . . . . . . 166
Diesel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170
Diesel engines
Starting the engine . . . . . . . . . . . . . . . . . . . . . . . . . 91
Diesel particle filter . . . . . . . . . . . . . . . . . . . . . . . . . . 152
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Digital clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Direction indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Distance driven . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Door
Child safety lock . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Door, luggage compartment door and bonnet ajar warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Driving economically . . . . . . . . . . . . . . . . . . . . . . . . 154
Driving time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
E
EDL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
Electric power-operated window
Operational faults . . . . . . . . . . . . . . . . . . . . . . . . . 42
Electrically adjustable rear mirror . . . . . . . . . . . . . . 53
Electronic Differential Lock . . . . . . . . . . . . . . . . . . . 147
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Electronic Differential Lock (EDL) . . . . . . . . . . . . . 147
Electronic immobiliser . . . . . . . . . . . . . . . . . . . . . 24, 31
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Electronic stability programme (ESP) . . . . . . . . . . 145
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Emergency locking of the door . . . . . . . . . . . . . . . . . 36
Engine
starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
switching off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Engine compartment
Safety information . . . . . . . . . . . . . . . . . . . . . . . . 174
Engine electronics
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176
change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
replenishing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Engine revolutions counter . . . . . . . . . . . . . . . . . . . . . 9
Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
Environmental compatibility . . . . . . . . . . . . . 154, 157
ESP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
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