Breakdown assistance
232
•Never start the engine with the vehicle sitting on the raised jack - danger
of suffering injury!
Caution
If you have to change a wheel on a slope first block the opposite wheel with a stone
or similar object in order to secure th e vehicle from unexpectedly rolling away.
Note
Comply with the national legal regulations.
Changing a wheel
Always change a wheel on a level surface as far as possible.
– Take off the full wheel trim* ⇒page 233 or the caps ⇒page 233.
– In the case of light alloy wheels remove the wheel trim cap ⇒page 234.
– First of all slacken the theft-de terrent wheel bolt*, afterwards the
other wheel bolts ⇒page 234.
– Jack up the vehicle until the wheel to be changed is clear of the ground
⇒ page 235.
– Unscrew the wheel bolts and place them on a clean surface (cloth, paper etc.).
– Take off the wheel.
– Fit on the spare wheel and tighten the wheel bolts slightly.
–Lower the car. – Tighten the wheel bolts firmly, al
ternately and diagonally using the
wheel wrench (crosswise) and last the theft-deterrent wheel bolt*
⇒ page 234.
– Mount the full wheel trim/w heel 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, ensure that the tyres rotate in the correct
direction ⇒page 222.
Subsequent steps
After changing the wheel, you must perform the following steps.
– Stow and attach the replaced wheel in the spare wheel well using the
special screw ⇒page 231, fig. 201 .
– 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. Steel and light alloy wheels must be tight-
ened to a tightening torque of 120 Nm.
– Have the defective tyre repaired as soon as possible.
WARNING
It is necessary to observe the guidelines given on ⇒page 224 if the vehicle is
subsequently fitted with tyres which are different to those it was fitted with
at the works.
WARNING (continued)
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Breakdown assistance233
Using the systemSafetyDriving TipsGeneral MaintenanceBreakdown assistanceTechnical Data
Note
•If you find, when changing the wheel, that the wheel bolts are corroded and
difficult to turn, the bolts mu st be replaced 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 at the tyre and pull off the wheel trim.
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.
Caution
•Use the pressure of your hand, do not knock on the full wheel trim! Heavy
knocks mainly on the points where the full wheel trim has not been inserted into
the wheel, can result in damage to the guide and centering elements of the full
wheel trim.
•First check for yourself that the th eft-deterrent wheel bolt is located
⇒ page 235, “Securing wheels against being stolen*” in the hole in the area of the
valve before fitting the full wheel trim onto a steel wheel which is attached with a
theft-deterrent wheel bolt.
Wheel bolts with caps*
Pulling off
– Push the plastic clip sufficiently fa r onto the cap until the inner catches
of the clip are positioned at the collar of the cap and detach the cap
⇒ fig. 202 .
Installing
– Push the caps fully onto the wheel bolts.
The caps are located in the we ll of the luggage compartment.
Fig. 202 Removing the cap.
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Using the systemSafetyDriving TipsGeneral MaintenanceBreakdown assistanceTechnical Data
Raise vehicle
You have to raise the vehicle with a lifting jack in order to be able to
take off the wheel.
Position the lifting jack by selecting the jacking point which is closest to
the wheel to be removed ⇒fig. 205 . The jacking point is located directly
below the engraving in the lower sill.
– Position the lifting jack below the jacking point and move it up until its claw is positioned directly below the vertical web of the lower sill.
– Align the car jack so that its claw grasps the web of the lower sill and the base plate is resting flat on the floor.
– Turn the lifting jack up further until the wheel is just clear of the ground.
Ground below the lifting jack which is soft and slippery can cause the vehicle to
slip off the jack. It is therefore always ne cessary to place the lifting jack on a solid
surface or use a wide and stable base. Use a non-slip base (e.g. a rubber foot mat)
if the surface is smooth, such as cobbled stones, a tiled floor, etc.
WARNING
•Always raise the vehicle with the doors closed - risk of injury!
•Take suitable measures to prevent the base of the lifting jack from slip-
ping off - risk of injury!
•Not positioning the lifting jack at the specified points can result in
damage to the vehicle. The jack can also sl ip off if it does not have sufficient
grip - risk of injury!
•It is important to support the vehicle with suitable supporting blocks if
you wish to work under the lifted vehicle - risk of injury!
Securing wheels against being stolen*
You need a special adapter for slackening the safety wheel bolts.
– Pull off the full wheel trim/cap from the wheel hub or cap from the safety wheel bolt.
– Insert the adapter with its toothed side fully into the inner toothing of the safety wheel bolt right down in such a way that only the
outer hexagon is jutting out ⇒fig. 206 .
– Insert the wheel wrench fully onto the adapter .
– Slacken the wheel bolt, or tighten it firmly ⇒page 234.
Fig. 205 Changing a wheel:
Points for positioning car jack
AA
AB
WARNING (continued)
Fig. 206 Safety wheel bolt
with adapter
AB
AA
AB
NKO B6 20.book Page 235 Wednesday, March 26, 2008 3:15 PM
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Using the systemSafetyDriving TipsGeneral MaintenanceBreakdown assistanceTechnical Data
Start engine
It is important to connect the jump -start cables in the correct order.
Connecting positive terminals
– Attach one end to the positive terminal ⇒page 237, fig. 207 of the
discharged battery .
– Attach the other end to the positive terminal of the battery supplying the power .
Connecting negative term inal and engine block
– Attach one end to the negative terminal of the battery supplying
the power .
– Attach the other end to a solid metal part which is connected firmly to the engine block, or to the engine block itself.
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.
•Run the jump-start cables so that th ey 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 in structions if you are going to use a
tow rope:
Driver of the towing vehicle
– Do not drive off until the tow rope is taught.
Fig. 207 Jump-starting using
the battery from another
vehicle: A - flat vehicle
battery, B - battery providing
current
A1
AA
A2
AB
A3
AB
A4
NKO B6 20.book Page 237 Wednesday, March 26, 2008 3:15 PM
Breakdown assistance
238
– Release the clutch particularly gent ly when starting off or depress the
accelerator particularly gently if yo ur vehicle is fitted with an auto-
matic gearbox.
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 wi ndscreen 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 si gnificantly 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.
Only attach the tow rope to the towing eyes provided for this purpose ⇒page 238
and ⇒page 239.
Driving style
Towing another vehicle requires a certain amount of practice. Both drivers should
be familiar with the particular points about towing a vehicle. Unskilled drivers
should not attempt to tow in another vehicle or to be towed in.
One should be constantly vigilant not to allow impermissibly high towing forces or
jerky loadings. There is always a risk of excessive stresses and damage resulting at
the points to which you attach the tow ro pe or tow bar when you attempt to tow a
vehicle which is not standing on a paved road.
Caution
If the gearbox of your vehicle no longer contains any oil because of a defect, your
vehicle must only be towed in with the driven wheels raised clear of the ground, or
on a special vehicle transporter or trailer.
Note
•Please comply with any legal requirements particularly regarding the switched
on signal systems, when towing in or tow-starting another vehicle.
•The tow rope must not be twisted as it may in certain circumstances result in the
front towing eye being unscrewed out of your vehicle.
Front towing eye
The towing eye is stored in the box for the vehicle tool kit.
Fig. 208 Front bumper:
Protective grille
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Using the systemSafetyDriving TipsGeneral MaintenanceBreakdown assistanceTechnical Data
– Take the cover out of the front bumper ⇒fig. 208 .
– Screw in the towing eye anticlockwise down to the stop ⇒fig. 209 and
tighten up using the wheel wrench (push the wheel wrench through
eye).
– Put the cover in place after scre wing out the towing eye again and
press into place. The co ver must engage firmly.
Rear towing eye
– Press onto the bottom part of the cap in the rear bumper ⇒fig. 210
and take it out.
– Screw in the towing eye anticlockwise down to the stop ⇒fig. 211 and
tighten up using the wheel wrench (push the wheel wrench through
eye).
– Put the cover in place after screwing out the towing eye again and press into place. The cover must engage firmly.
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 236 or call on the services of the SERVICE mobile.
If your vehicle has to be towed
– Engage 2nd or 3rd gear wi th the vehicle stationary.
– Depress the clutch pedal fully and keep it depressed.
– Switch on the ignition.
– Wait until both vehicles are movi ng then release the clutch pedal
slowly.
Fig. 209 Front bumper:
Installing the towing eye
Fig. 210 Rear bumper:
Removing cover
Fig. 211 Rear bumper:
Installing the towing eye
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Fuses and light bulbs
242
Fuse cover in engine compartment
The fuse box in the engine comp artment exists in two different
versions. You can determine which vers ion your vehicle is fitted with
after removing the fuse cover at the location of the fuses.
For particular model versions, the battery must be removed before
removing the fuse cover ⇒page 216.
Removing fuse cover
– Move the circlips ⇒fig. 213 as far as the stop, the symbol
appears behind the circlip and remove the cover.
Installing fuse cover
– Position the fuse cover on the fuse box and push the circlips as far as the stop - the symbol
is visible behind the circlip.
Caution
•When unlocking and locking the fuse cover, it must be pressed on the sides to
the box, otherwise damage can occur to the locking mechanism.
•Carefully position the fuse cover in the engine compartment. If the cover was
not correctly positioned, water can get into the fuses and this results in a damage
to the vehicle!
Fuse assignment in engine compartment - version 1
Certain electrical components are only standard on certain vehicle model versions
or only suppliable as optional equipment for certain models.
Fig. 213 Fuse cover in engine
compartment
AA
AA
No.Power consumerAmperes
F1Front right main headlight, right rear light unit30
F2Valves for ABS20
F3Not assigned
F4Not assigned
F5Horn15
F6Power supply for terminal 15 (ignition on)40
F7Not assigned
F8Not assigned
F9Valves10
F10Not assigned
F11Lambda probe10
Fig. 214 Schematic repre-
sentation of fuse box in
engine compartment -
version 1
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Fuses and light bulbs245
Using the systemSafetyDriving TipsGeneral MaintenanceBreakdown assistanceTechnical Data
Fuse assignment in the dash panel
Certain electrical components are only standard on certain vehicle model versions
or only suppliable as optional equipment for certain models.
No.Power consumerAmperes
1Diagnostic socket, engine cont rol unit, relay EKP, control
unit for EKP7,5
2Control unit for ABS, ESP, swit ch for tyre inflation pres-
sure-control system, brake sensor5
3Switch and control unit for airbag5
4WIV, parking light, dimming rear mirror, pressure sensor,
telephone preinstallation5
5Control unit for headlamp beam adjustment and head-
light swivel, control unit for parking aid5
6Instrument cluster, control unit for electromechanical
power steering, Haldex5
7Valve heating, air mass meter10
Fig. 216 Schematic repre-
sentation of the fuse carrier
in the dash panel
8Control unit for trailer detection5
9Relay for auxiliary heating5
10Adaptive left main headlight10
11Adaptive right main headlight10
12Central locking system of the front doors10
13Diagnostic socket, light switch, rain sensor, clock7,5
14Central locking system and bonnet lid15
15Central control unit - interior lights7,5
16The air conditioning system7,5
17Central locking system of the rear doors10
18Not assigned
19Not assigned
20ABS, ESP, Uphill-Start off-Assist5
21Not assigned
22Air blower for Climatronic40
23Front power window30
24Selector lever lock5
25Rear window heater
relay for auxiliary heating and ventilation25
30
26Power socket in the luggage compartment25
27Fuel pump relay,
Fuel pump relay, control unit for fuel pump, injection
valves15
20
28Not assigned
29Not assigned
30Not assigned
No.Power consumerAmperes
NKO B6 20.book Page 245 Wednesday, March 26, 2008 3:15 PM