Wheels and Tyres195
Using the systemSafetyDriving TipsGeneral MaintenanceBreakdown assistanceTechnical Data
setting off on a long trip. Please do not forget the spare wheel when checking the tyres.
The tyre inflation pressures for summer tyres are indicated on the inside of the fuel filler flap ⇒page 194, fig. 177. The inflation pressures for winter tyres are 20 kPa (0.2 bar) higher than those for summer tyres ⇒page 198.
The tyre pressure should be at the highest pressure specified for your vehicle at all times.
Always check the inflation pressure of tyres when cold. Do not reduce the higher pressure 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 braking (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 since 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 rear 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 rolling resistance. 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 appropriately cautious style of driving.
For the sake of the environment
Tyres which are insufficiently inflated increase your fuel consumption.
Wear indicators
The 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. 178. Markings on the walls of the tyres through the letters “TWI”, triangular symbols or other symbols identify the 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 (continued)
Fig. 178 Tyre tread with wear indicators
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Wheels and Tyres198
Winter tyres
The handling of your vehicle will be significantly improved when driving on wintry roads if you fit winter tyres. Summer tyres do not offer the same grip on ice, snow and at temperatures below 7 °C because of their construction (width, rubber blend, tread pattern). This applies in particular to vehicles which are equipped with low-profile tyres or high-speed tyres (code index H, V or W on wall of tyre).
Winter tyres must be mounted on all four wheels to obtain the best handling char-acteristics.
You must only fit those types of winter tyre which are approved for your vehicle. The permissible sizes of winter tyres are stated in your vehicle documents. Approvals may differ because of national legislation.
Please remember that the tyres should be inflated to 20 kPa (0.2 bar) more than is the case for summer tyres ⇒page 194.
Winter tyres no longer offer the same winter performance once the tyre tread has worn down to a depth of about 4 mm.
Ageing also causes winter tyres to lose most of their winter performance properties - even in cases where the remaining tread depth is still clearly more than 4 mm.
Speed restrictions apply to winter tyres as well as to summer tyres ⇒page 196, ⇒.
You can fit winter tyres of a lower speed category to your vehicle provided that you also do not drive faster than the permissible maximum speed for such tyres, even if the possible maximum speed of your vehicle is higher. The corresponding tyre category can damage the tyres when exceeding the permissible maximum speed.
Please pay attention to the notes if you decide to fit winter tyres ⇒page 194.
You can also fit so-called “all-year tyres” instead of winter tyres.
Please contact your specialist garage if there are any points which are not clear who will be able to provide you with information regarding the maximum speed for your tyres.
WARNING
You must on no account drive your car at more than the permissible maximum speed for your winter tyres - risk of an accident resulting from tyre damage and loss of control over your car.
For the sake of the environment
Fit your summer tyres on again in good time since summer tyres offer you better grip and handling on roads which are free of snow and ice as well as ar tempera-tures below 7 °C - the braking distance is shorter, there is less tyre noise, tyre wear is reduced and fuel consumption is reduced.
Note
Please observe the various differing legal requirements regarding tyres.
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.
Should it be necessary to fit on a spare wheel in exceptional cases with a tyre not dedicated to the running direction or in opposite running direction, please adopt a cautious style of driving as the tyre is no longer able to provide optimal grip and handling in such a situation. This particularly important on wet roads. Please refer to the notes ⇒page 202, “Spare wheel*”.
You should have the defective tyre replaced as soon as possible and restore the correct direction of rotation on all tyres
Snow chains
Snow chains must only be mounted on the front wheels.
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Breakdown assistance209
Using the systemSafetyDriving TipsGeneral MaintenanceBreakdown assistanceTechnical Data
Starting engine
– Start the engine of the vehicle providing current and run the engine at
idling speed.
– Now start the engine of the vehicle with the discharged battery.
– Interrupt the attempt at starting an engine after 10 seconds if it does
not start right away and wait for about 30 seconds before repeating
the attempt.
– Disconnect the cables on the engine in exactly the reverse order they
were connected up.
WARNING
•The non-insulated parts of the terminal clamps must never make contact with each other. Furthermore, the cable connected to the positive terminal of the battery must not come into contact with electrically conducting parts of the vehicle - risk of a short circuit!
•Do not affix the jump starting cables to the negative terminal of the discharged battery. There is the risk of detonating gas seeping out the battery being ignited by the strong spark which results from the engine being started.
•Do not affix the cable end to parts of the fuel and brake system.
•Run the jump-start cables so that they cannot be caught by any rotating parts in the engine compartment.
•Do not bend over the batteries - risk of caustic burns!
•The vent screws of the battery cells must be tightened firmly.
•Keep any sources of ignition (naked flame, smouldering cigarettes etc.) away from the battery - risk of an explosion!
Tow-starting and towing vehicle
General
Please pay attention to the following instructions if you are going to use a
tow rope:
Driver of the towing vehicle
– Do not drive off until the tow rope is taught.
– Release the clutch particularly gently when starting off.
Driver of the towed vehicle
– Switch the ignition on so that the steering wheel is not blocked and
you can also operate the turn signal lights, the headlight flasher, the
windscreen wipers and windscreen washer system.
– Take the vehicle out of gear or move the selector lever into position N
if your vehicle is fitted with an automatic gearbox.
– Note that the brake servo unit and power steering only operate if the
engine is running. You will require significantly greater physical force
to depress the brake pedal and to steer the vehicle if the engine is not
running.
– Ensure that the tow rope is always kept taught.
Tow rope or tow bar
A tow bar is safest way of towing a vehicle and also minimizes any shocks. You can use a tow rope only if a suitable tow bar is not available.
The tow rope must be elastic to protect the vehicle. Thus one should only use plastic fibre rope or a rope made out of a similarly elastic material.
Attach the tow rope or the tow bar only to the towing eyes provided for this purpose ⇒page 210, “Front towing eye” and ⇒page 211, “Rear towing eye”.
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Breakdown assistance211
Using the systemSafetyDriving TipsGeneral MaintenanceBreakdown assistanceTechnical Data
Rear towing eye
The rear towing eye is located below the rear bumper on the right ⇒fig. 191.
Tow-starting a vehicle
If the engine does not start, we generally do not recommend to tow-start
your vehicle. One should attempt to start the engine using jump start
cables ⇒page 208 or call on the services of the SERVICE mobile.
If your vehicle has to be towed:
– Engage 2nd or 3rd gear with the vehicle stationary.
– Depress the clutch pedal fully and keep it depressed.
– Switch on the ignition.
– Wait until both vehicles are moving then release the clutch pedal
slowly.
– Depress the clutch pedal fully when the engine fires and take the
vehicle out of gear.
WARNING
There is high risk of having an accident when tow-starting a vehicle, when for example the towed vehicle runs into the towing vehicle.
Caution
Vehicles which are fitted with a catalytic converter should not be tow-started over a distance of more than 50 metres. Unburnt fuel may get into the catalytic converter and damage it.
Towing in a vehicle fitted with a manual gearbox
Please refer to the notes ⇒page 209.
The car can be towed in with a tow bar or a tow rope or with the front or rear wheels raised. The maximum towing speed is 50 km/h.
Towing of a vehicle with an automatic gearbox
Please refer to the notes ⇒page 209.
The car can be towed in with a tow bar or a tow rope. Refer at the same time to the following guidelines:
•Move selector lever into N.
•The maximum towing speed is 50 km/h.
•The maximum permissible towing distance is 50 km. The gear oil pump does not operate when the engine is not running; the gearbox would not be adequately lubricated at higher speeds and over longer towing distance.
Caution
If the vehicle is towed in by a recovery vehicle, it should only be towed in with the front wheels raised. If the vehicle is raised at rear, the automatic gearbox is damaged!
Fig. 191 Rear towing eye
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Technical Data224
Gearbox code, paint number, interior equipment number, engine output, engine code
Partial description of the vehicle
7GG - vehicles with DPF ⇒page 158
Vehicle identification number (VIN)
The vehicle identification number - VIN (vehicle body number) is stamped into the engine compartment on the right hand shock absorber dome. This number is also located on a sign on the lower left hand edge below the windscreen (together with a VIN bar code).
Engine number
The engine number is stamped into the engine block.
Type plate (production plate)
The type plate is located in the engine compartment at the front on the left hand shock absorber dome.
Homologation sign
The homologation sign is located on the lock carrier. Vehicles for certain countries do not have an homologation sign.
Sticker on inside of fuel filler flap
The sticker is affixed to the inside of the fuel filler flap. The sticker contains the following data:
•The prescribed types of fuel,
•Tyre si z e,
•Tyre pressure.
Fuel consumption according to the regulations
(99/100/EU)
Depending on the range of the special equipment, style of driving, traffic situation, weather influences and vehicle condition, the consumption values which in prac-tice 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 urban traffic is simulated.
Non-urban traffic
For the consumption measurement in non-urban traffic the vehicle, as in daily motoring, is accelerated and braked several 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 the value for the non-urban traffic.
Note
•Please note that the information stated in the official vehicle registration documents always takes priority.
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