Page 237 of 304

Wheels and tyres235
Safety First
Controls and equipment
Practical tips
Technical Data
Wear indicators
The original tyres on your vehicle have 1.6 mm high “tread wear indicators”
⇒
page 234, fig. 153 , running across the tread. Depending on the make,
there will be six to eight 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 indica-
tors). 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 232.
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 advisable
to cha nge t he m ar oun d as sh own ⇒ page 234, fig. 154. 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 results
in steering vibration.
Unbalanced wheels should be rebalanced, as they otherwise cause excessive
wear on steering, suspension and tyres. A wheel must also be rebalanced
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 align-
ment 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 is worn down to
the tread wear indicators. 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.Anti-puncture tyres
Anti-puncture tyres allow you to continue driving even with a
punctured tyre, in the majority of cases.Vehicles equipped with anti-puncture
23) tyres from the factory indi-
cate the loss of tyre pressure on the instrument panel.
23)Depending upon version and country.
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Wheels and tyres239
Safety First
Controls and equipment
Practical tips
Technical Data
WARNING
The maximum speed for the winter tyres must not be exceeded. Otherwise,
this could lead to tyre damage and thus, an accident risk.
For the sake of the environment
Fit your summer tyres in good time. They are quieter, do not wear so quickly
and reduce fuel consumption.Snow chainsSnow chains are only permitted on front wheels and only for tyres 195/65R15
and 205/55R16. These tyres may only be fitted with fine-pitch link chains
which do not protrude more than 15 mm ⇒page 272. For 235/35R19 tyres,
the use of snow chains is not permitted.
Other tyres may use fine-pitch links which do not protrude more than 9 mm,
including tension device.
Remove wheel hub covers and trim rings before fitting snow chains. For safety
reasons cover caps, available in any Authorised Service Centre, must then be
fitted over the wheel bolts.
WARNING
Snow chains should be correctly tightened in accordance with the manu-
facturer's instructions. This will pr event the chains coming into contact
with the wheel housing.
Caution
You must remove the snow chains to drive on roads which are free of snow.
Otherwise they will impair handling, damage the tyres and wear out very
quickly.
Note
•In some countries, the speed limit for using snow chains is 50 km/h. The
legal requirements of the country should be followed.•We recommend that you ask your Approved Service Centre for information
about appropriate wheel, tyre and snow chain size.
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Page 271 of 304

General notes on the technical data269
Safety First
Controls and equipment
Practical tips
Technical Data
Te ch n i c a l D a t aGeneral notes on the technical dataOutstanding informationImportant considerations
All data in the official vehicle documents take precedence
over this data.All data provided in this manual are valid for the standard model in Spain. The
vehicle data card included in the Maintenance Programme or the vehicle
registration documents shows which engine is installed in the vehicle.
The figures may be different depending on if additional equipment is fitted,
for different models, for special vehicles and for other countries. Abbreviations used in this paragraph of the Technical Data
Abbrevia-
tion
Meaning
kW
Kilowatt, engine power measurement.
bhp
Brake horse power, formerly used to denote engine power
at rpm
Revolutions per minute - engine speed.
Nm
Newton metres, unit of engine torque.
l/100 km
Fuel consumption in litres per 100 km.
g/km
Carbon dioxide emissions in grams per km travelled.
CO2
Carbon dioxide
CN
Cetane number, indication of the diesel combustion power.
RON
Research octane number, indication of the knock resistance
of petrol.
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General notes on the technical data271
Safety First
Controls and equipment
Practical tips
Technical Data
Data on fuel consumptionFuel consumption
The consumption and emission details shown on the vehicle
data sticker differ from one vehicle to another.The fuel consumption and CO
2 emissions of the vehicle can be found on the
vehicle data sticker.
The fuel consumption and emissions figures given are based on the vehicle
weight category, which is determined according to the engine/gearbox
combination and the equipment fitted.
The consumption and emission figures are calculated in accordance with the
EC test requirements 1999/100/EC. These test requirements specify a real-
istic test method based on normal everyday driving.
The following test conditions are applied:
Note
•Actual consumption may vary from quoted test values, depending on
personal driving style, road and traffic conditions, the weather and the
vehicle condition.WeightsKerb weight refers to the basic model with a fuel tank filled to 90% capacity
and without optional extras. The figure quoted includes 75 kg to allow for the
weight of the driver.
For special versions and optional equipment fittings or for the addition of
accessories, the weight of the vehicle will increase ⇒.
WARNING
•Please note that the centre of gravity may shift when transporting
heavy objects; this may affect the vehicle's handling and lead to an acci-
dent. Always adjust your speed and driving style to suit road conditions
and requirements.•Never exceed the gross axle weight rating or the gross vehicle weight
rating. If the allowed axle load or the allowed total weight is exceeded, the
driving characteristics of the vehicle may change, leading to accidents,
injuries and damage to the vehicle.
Urban cycle
The urban cycle starts with an engine cold start. City driving
is then simulated.
Extra urban
cycle
In the extra urban cycle simulation the vehicle frequently
accelerates and brakes in all gears, as in normal everyday
driving. The road speed ranges from 0 to 120 km/h.
To ta l co n-
sumption
The average total consumption is calculated with a weighting
of around 37% for the urban cycle and 63% for the extra
urban cycle.
CO2 emis-
sions
The exhaust gases are collected during both driving cycles to
calculate carbon dioxide emissions. The gas composition is
then analysed to evaluate the CO
2 content and other emis-
sions.
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