Intelligent technology183
Safety First
Controls and equipment
Practical tips
Technical Data
•With compact temporary spare wheel.•When using the snow chains.•When driving in deep snow or on soft terrain.•When the vehicle is bogged-down, to free it by “rocking.”
The TCS should be switched on again afterwards as soon as possible.WARNING
•It must be remembered that TCS cannot defy the laws of physics. This
should be kept in mind, particularly on slippery and wet roads and when
towing a trailer.•Always adapt your driving style to suit the condition of the roads and
the traffic situation. Do not let the extra safety afforded by TCS tempt you
into taking any risks when driving, this can cause accidents.Caution
•In order to ensure that TCS function correctly, all four wheels must be
fitted with the same tyres. Any differences in the rolling radius of the tyres can
cause the system to reduce engine power when this is not desired.•Modifications to the vehicle (e.g. to the engine, the brake system, running
gear or any components affecting the wheels and tyres) could affect the effi-
ciency of the ABS and TCS.XDS*
Driveshaft differentialWhen taking a bend, the driveshaft differential mechanism allows the outer
wheel to turn at a higher speed than the inner wheel. In this way, the wheel
which is turning faster (outer wheel) receives less drive torque than the inner
wheel. This may mean that in certain situations the torque provided to the inner wheel is too high, causing the wheels to spin. On the other hand, the
outer wheel receives a lower drive torque than it could transmit. This causes
an overall loss of lateral grip on the front shaft, resulting in understeering or
“lengthening” of the path.
The XDS system is able, using the ESP sensors and signals, to detect and
correct this effect.
The XDS, via the ESP, brakes the inner wheel thus counteracting the excess
drive torque in this wheel. This means that the path requested by the driver
is more precise,
The XDS system operates in combination with the ESP and is always active,
even when the traction control, TCS, is disconnected.
Electronic stabilisation programme (ESP)*General notes
The electronic stabilisation programme increases the
vehicle's stability on the road.The electronic stabilisation programme helps to reduce the danger of skid-
ding.
The electronic stabilisation programme (ESP) consists of
ABS, EDL, TCS and
Steering manoeuvre recommendations.
Electronic Stabilising Program (ESP)*
ESP reduces the danger of skidding by braking the wheels individually.
The system uses the steering wheel angle and road speed to calculate the
changes of direction desired by the driver, and constantly compares them
with the actual behaviour of the vehicle. If the desired course is not being
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Wheels and tyres
238Wheel 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 206.
After the wheels have been changed, the tightening torque of the wheel bolts
s ho uld b e che cke d as s o on as p ossible wit h a to rqu e w re nch. ⇒ 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 too 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 can 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 237, “New tyres and wheels” determines the
following speed limits for winter tyres: ⇒
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 237, “New tyres and wheels”.
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If and when
240If and whenTools, tyre repair kit and spare wheelVehicle Tools
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.•Towi ng e ye•Adapter for the anti-theft wheel bolts*
Some of the items listed are only provided 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.•If work is to be carried out underneath the vehicle, this must be secured
by suitable stands. Otherwise, there is a risk of injury.WARNING (continued)
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If and when243
Safety First
Controls and equipment
Practical tips
Technical Data
–Remove the wheel and then mount the spare wheel
– Lower the vehicle.
– Tighten the wheel bolts firmly with the box spanner.
– Replace the wheel trim.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 th e wheel bolts checked as soon as
possible with a torque wrench. Th e prescribed torque must be
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.•For your 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. 156 .
–Pull off the hub cap.
Fig. 156 Changing the
wheel: Removing a hub
cap
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General notes on the technical data
272Towing a trailerTrailer weightsTrailer weights
The trailer weights and drawbar loads approved are selected in intensive
trials according to precisely defined criteria. The approved trailer weights are
valid for vehicles in the EU for maximum speeds of 80 km/h (in certain
circumstances up to 100 km/h). The figures may be different in other coun-
tries. All data in the official vehicle documents take precedence over these
data ⇒ .
Drawbar load
The maximum permitted weight exerted by the trailer drawbar on the ball joint
of the towing bracket must not exceed 75 kg.
In the interest of road safety, we recommend that you always tow
approaching the maximum drawbar load. The response of the trailer on the
road will be poor if the drawbar load is too small.
If the maximum permissible drawbar load cannot be met (e.g. with small,
empty and light-weight single axle trailers o r ta n d e m a x l e t r a i l e r s wi t h a n a x le
base of less than 1 metre), at least 4% of the actual trailer weight is a legal
stipulation for a drawbar load.
WARNING
•For safet y reas ons , d o not excee d the 8 0 k m/h limit . Th is is als o valid in
countries where higher speeds are permitted.•Never exceed the maximum trailer weights or the draw bar loading. If
the permissible axle load or the permissible total weight is exceeded, the
driving characteristics of the vehicle may change, leading to accidents,
injuries and damage to the vehicle.
WheelsTyre pressure, snow chains, wheel boltsTyre pressures
The sticker with the tyre pressure values can be found on the inside of the
tank flap. The tyre pressure values given there are for cold tyres. The slightly
raised pressures of warm tyres must not be reduced ⇒.
Snow chains
Snow chains may be fitted only to the front wheels.
Consult the chapter “wheels” of this manual.
Wheel bolts
After the wheels have been changed, the tightening torque of the wheel bolts
s ho uld b e che cke d as s o on as p ossible wit h a to rqu e w re nch ⇒ . The tight-
ening torque for steel and alloy wheels is 120 Nm.
WARNING
•Check the tyre pressure at least once per month. Checking tyre pressure
value is very important. If the tyre pressure is too high or too low, there is
an increased danger of accidents, particularly at high speeds.•If the torque of the wheel bolts is too low, they could loosen while the
vehicle is in motion. Risk of accident! If the tightening torque is too high,
the wheel bolts and threads can be damaged.Note
We recommend that you ask your Authorised Service Centre for information
about appropriate wheel, tyre and snow chain size.
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Index
300The danger of not using the seat belt . . . . . . . . 21
Tightening torque of wheel bolts . . . . . . . . . . . 272
To fold down the seat back . . . . . . . . . . . . . . . 134
Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240
Tow starting
Comments . . . . . . . . . . . . . . . . . . . . . . . . . . 266
Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 266
Towing a trailer . . . . . . . . . . . . . . . . . . . . . . . . . 272
Towing bracket . . . . . . . . . . . . . . . . . . . . . . . . . 194
Towing bracket, fitting . . . . . . . . . . . . . . . . . . . 195
Towing eye . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 266
Tow-starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 266
Traction control system warning lamp . . . . . . . . . . . . . . . . . . . . . . . . . 84
Trailer Trailer towing . . . . . . . . . . . . . . . . . . . . . . . . 193
Trailer eyes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 267
Trailer turn signals Warning lamp . . . . . . . . . . . . . . . . . . . . . . . 118
Trailer weights . . . . . . . . . . . . . . . . . . . . . . . . . . 272
Turn signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118 Warning lamp . . . . . . . . . . . . . . . . . . . . 78, 118
Type plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 270
Tyre Mobility-System (Tyre repair kit) . . . . . . . 242
Tyre monitor indicator . . . . . . . . . . . . . . . . . . . . . 80
Tyre pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . 232 Loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234
Tyre pressure monitoring . . . . . . . . . . . . . . . . . 233
Tyre pressures . . . . . . . . . . . . . . . . . . . . . . . . . . 272
Tyre repair kit . . . . . . . . . . . . . . . . . . . . . . . 242, 247 Tyre-Mobility-System (Tyre repair kit) . . . . . . . 247
Tyres and wheels
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . 237
Tyres service life . . . . . . . . . . . . . . . . . . . . . . . . 234
Tyres tread depth . . . . . . . . . . . . . . . . . . . . . . . 235
Tyres with directional tread pattern . . . . . . . . . 232
UUnderbody sealant . . . . . . . . . . . . . . . . . . . . . . 203
Unlocking and locking Personalisation . . . . . . . . . . . . . . . . . . . . . . . 96VVehicle battery . . . . . . . . . . . . . . . . . . . . . . . . . 229
Vehicle data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 270
Vehicle identification data . . . . . . . . . . . . . . . . 270
Vehicle identification number . . . . . . . . . . . . . 270
Vehicle modifications . . . . . . . . . . . . . . . . . . . . 206
Vehicle paintworkProducts for vehicle maintenance . . . . . . . 197
Waxing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199
Vehicle tools Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240
Vehicle wallet storage . . . . . . . . . . . . . . . . . . . 135
Vehicle washing . . . . . . . . . . . . . . . . . . . . . . . . 198
Ventilation slits . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Volumetric sensor* Activation . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Deactivation . . . . . . . . . . . . . . . . . . . . . . . . 102
WWarning lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Warning lamps . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Warning reports
Red . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Yellow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Warning texts in the display . . . . . . . . . . . . . . . . 64
Warning triangle . . . . . . . . . . . . . . . . . . . . . . . . 139
Washer fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . 224
Washing by hand . . . . . . . . . . . . . . . . . . . . . . . 198
Washing the vehicle . . . . . . . . . . . . . . . . . . . . . 198
Washing with high pressure cleaners . . . . . . . 199
Water warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Water in the windscreen washer tank . . . . . . . 224
Wear indicators . . . . . . . . . . . . . . . . . . . . . . . . . 235
Wheel bolts . . . . . . . . . . . . . . . . . . . . . . . . 244, 272 Torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238
Wheel change . . . . . . . . . . . . . . . . . . . . . . . . . . 242
Wheel trims . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243
Wheels . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232, 272
Why assume the correct sitting position? . . . . . 29
Why should head restraints be correctly adjusted? 13
Why to wear seat belts? . . . . . . . . . . . . . . . . . . . 19
Why wear seat belts? . . . . . . . . . . . . . . . . . . 20, 29
Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Windscreen washer fluid Warning lamp . . . . . . . . . . . . . . . . . . . . . . . . 80
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