
317
If and when
Move the selector lever to its intermediate position or to P ⇒ page 176.
Stop the engine and remove the key from the ignition ⇒ page 172.
Have all occupants leave the vehicle and move to safety, for example
behind a guard rail.
When leaving the vehicle, take all keys with you.
Place an emergency warning triangle to indicate the position of your ve-
hicle to other road users.
Allow the engine to cool and check if a specialist is required.
Examples of when to use the hazard warning lights:
● If the vehicles ahead suddenly slow down or reach the end of a traffic
jam, to warn the vehicles behind.
● In case of an emergency.
● If the vehicle breaks down.
● When being towed.
Always comply with the applicable laws regarding the use of hazard warn-
ing lights.
If the hazard warning lights are not working, you must use an alternative
method of drawing attention to your vehicle. This method must comply with
traffic legislation.
WARNING
Failure to follow the checklist prepared for your own safety could lead to
accidents and severe injuries.
● Always complete the operations given in the checklist and observe
the general rules of safety.
4.
5.
6.
7.
8.
9.WARNING
The components of the exhaust system reach very high temperatures.
This could cause a fire and considerable damage.
● Always park your vehicle so that no part of the exhaust system can
come in contact with flammable materials (such as dried grass or fuel).
Note
● The vehicle battery will discharge and run down if the hazard warning
lights remain on for too much time (even with the ignition turned off).
● For some vehicles, the brake lights will blink when braking suddenly at
speeds of approximately 80 km/h (50 mph) to warn vehicles behind. If brak-
ing continues, then the hazard warning lights system will automatically be
turned on at the speed of less than approximately 10 km/h (6 mph). The
brake lights remain lit. Upon accelerating, the hazard warning lights will be
automatically turned off.
Safety FirstOperating instructionsPractical TipsTechnical Specifications

326If and when
Fuses
Introduction
Due to the constant update of vehicles, fuse assignments depending on
equipment and the use of the same fuse for various electrical components,
at the time of printing this manual it is not possible to provide an up-to-date
summary of the electrical components fuse positions. For detailed informa-
tion about the fuse positions, please consult a Technical Service.
In general, a fuse can be assigned to various electrical components. Like-
wise, an electrical component can be protected by several fuses.
Only replace fuses when the cause of the problem has been solved. If a
newly inserted fuse blows after a short time, you must have the electrical
system checked by a specialised workshop as soon as possible.
Additional information and warnings:
● Working in the engine compartment ⇒ page 279
WARNING
The high voltages in the electrical system can give serious electrical
shocks, causing burns and even death!
● Never touch the electrical wiring of the ignition system.
● Take care not to cause short circuits in the electrical system.
WARNING
Using unsuitable fuses, repairing fuses or bridging a current circuit with-
out fuses can cause a fire and serious injury.
● Never use a fuse with a higher value. Only replace fuses with a fuse of
the same amperage (same colour and markings) and size.
● Never repair a fuse.
● Never replace a fuse by a metal strip, staple or similar.
CAUTION
● To avoid damage to the vehicles electric system, before replacing a fuse
turn off the ignition, the lights and all electrical elements and remove the
keys from the ignition.
● If you replace a fuse with higher-rating fuse, you could cause damage to
another part of the electrical system.
● Protect the fuse boxes when open to avoid the entry of dust or humidity.
Dirt and humidity inside fuse boxes can cause damage to the electrical sys-
tem.
Note
● One single consumer could have more than one fuse.
● Several consumers could run over one single fuse.

331
If and when
Several warning and control lamps should light up for a few seconds when
the ignition is switched on, signalling that the function is being verified.
They will switch off after a few seconds.
Checking the bulbs of a trailer
For vehicles with the factory fitted towing bracket, certain trailer lights are
also controlled if the power socket is correctly connected.
A fault on a trailer turn signal is indicated on the instrument panel by the
turn signal blinking twice as fast ( or ) ⇒ page 96.
● General fault of all turn signals on one side.
● Fault in one tail light (on some models, also the registration light).
● Fault in two brake lights.
WARNING
If the warning lamps and messages are ignored, the vehicle may stall in
traffic, or may cause accidents and severe injuries.
● Never ignore the warning lamps or text messages.
● Stop the vehicle safely as soon as possible.
CAUTION
Failure to heed the control lamps and text messages when they appear may
result in faults in the vehicle.
Note
A fault in the LED on the tail lights will not be indicated. However, if the fault
affects all the LEDs then this will be indicated by the control lamp . Information for replacing bulbs
Checklist
To replace a bulb, carry out the following operations always in the order giv-
en ⇒
:
Park the vehicle a safe distance from traffic and on suitable ground.
Connect the electronic parking brake ⇒ page 185.
Turn the light switch to position 0 ⇒ page 96.
Move the gear lever into the neutral position ⇒ page 96.
Automatic gearbox: move the selector lever to position P ⇒ page 176.
Stop the engine and remove the key from the ignition ⇒ page 172.
Manual gearbox: Select a gear ⇒ page 176.
Wait until all of the vehicle interior lights are turned off ⇒ page 96.
Allow the corresponding bulb to cool. Visually inspect fuses to see if any are blown ⇒ page 326.
Replace the bulb according to the instructions ⇒
. Bulbs should only
be replaced by new identical models. Bulb information is displayed on
the bulb socket or on the bulb itself.
In general, never touch the bulb glass directly. The heat of the bulb
would cause the fingerprint to evaporate and condense on the reflector.
This will impair the brightness of the headlight.
Check if the new bulb is working. If the bulb is not working, it may not
have been correctly fitted, it could be damaged or the connector may
not be correctly connected.
Every time a bulb for the headlights is replaced, visit a specialised
workshop to check the headlights.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
Safety FirstOperating instructionsPractical TipsTechnical Specifications

332If and when
WARNING
Failure to follow the checklist prepared for your own safety could lead to
accidents and severe injuries.
● Always complete the operations given in the checklist and observe
the general rules of safety.CAUTION
Always remove and fit headlights carefully to avoid damage to the paint-
work and other vehicle parts.
To replace halogen headlight bulbs
Fig. 206 In the engine
compartment: Left-hand
side headlight lining. A
dipped beam headlights,
B daytime driving lights
and C main beam head-
lights and side lightsFig. 207 Left headlight
There is no need to remove the headlight to replace bulbs.
Complete operations only in the sequence given:
Fig. 206, Fig. 207 ABCTurn signals (small lamp holder)Dipped beam head-lightsDaytime driving lightMain beam headlightsSide lights
1.Always take the checklist into account and take the necessary actions ⇒ page 331.2.Open the bonnet ⇒ page 279.

334If and when
To replace the xenon headlights bulb
Fig. 208 In the engine
compartment: Turn signal
cover
Fig. 209 Turn signal
lamp holder 1 and turn-
ing light 2.
There is no need to remove the headlight to replace bulbs.
Complete operations only in the sequence given:
Turn signals 1Turning lights 2
1.Always take the checklist into account and take the necessary ac-
tions ⇒ page 331.
2.Open the bonnet ⇒ page 279.
3.Rotate the cover ⇒ Fig. 208 in the direction of the arrow and remove
it.
4.
Rotate the lamp holder 1⇒ Fig. 209 to the left all the way
and pull it out backwards with
the bulb.Press the wire clip downwards
and pull the lamp holder 2
⇒ Fig. 209 out with the bulb.
5.Depending on the model, the bulb is removed directly from the
lamp holder or it may need to be rotated and then removed.
6.Replace the faulty bulb by a new identical bulb.
7.Place the bulb holder in the
headlight and rotate to the right
all the way.Place the lamp holder in the
headlight and pull the wire clip
upwards until it clicks into place.
8.Rotate the cover ⇒ Fig. 208 in the opposite direction to the arrow as
far as it will go.
Always seek the help of a specialist when changing the Xenon dipped beam
and main beam headlamps ⇒ in Introduction on page 330.
Note
The illustrations show the left hand headlight. The structure of the right
hand side headlight is symmetric.

341
If and when
Starting assistance
Introduction
If the engine fails to start because of a discharged battery, the battery of an-
other vehicle can be used to start the engine. Before starting, check the
magic eye on the battery ⇒ page 292.
For starting assistance, jump lead cables conforming to the standard
DIN 72553 are required (see the cable manufacturer instructions). The jump
lead cable must be at least 25 mm 2
in section (0.038 inches 2
) for petrol en-
gines, and 35 mm 2
(0.054 inches 2
) for diesel engines.
For vehicles whose battery is not in the engine compartment, the jump
leads should only be connected to the starting assistance connection
points in the engine compartment.
Additional information and warnings:
● Starter assist systems (Start-Stop function) ⇒ page 196
● Working in the engine compartment ⇒ page 279
● Selective Catalytic Reduction (AdBlue) ⇒ page 275
● Vehicle battery ⇒ page 292
WARNING
Incorrect use of jump leads and incorrectly jump starting could cause the
battery to explode resulting in serious injury. Please observe the follow-
ing rules to minimise the risk of a battery explosion:
● All work involving the vehicle battery and electrical system can cause
corrosion, fire and serious electric shocks. Always read and take into ac-
count the safety warnings and standards before beginning work on the
battery ⇒ page 292, Vehicle battery.
WARNING (Continued)
● The battery providing current must have the same voltage (12V) and
approximately the same capacity (see markings on battery) as the flat
battery.
● Never charge a frozen or recently thawed battery. A flat battery can al-
so freeze at temperatures close to 0 °C (+32 °F).
● If a battery is frozen and/or has been frozen then it must be replaced.
● A highly explosive mixture of gases is released when the battery is
being charged. Always keep lit cigarettes, open flames, sparks and fire
far from the battery. Never use a mobile telephone when connecting and
removing the jump leads.
● Charge the battery only in well ventilated areas given that when the
battery is charged by outside assistance, it creates a mix of highly explo-
sive gases.
● Jump leads should never enter into contact with moving parts in the
engine compartment.
● Never switch the positive and negative poles or connect the jump
leads incorrectly.
● Note the instruction manual provided by the manufacturer of the jump
leads.
CAUTION
To avoid considerable damage to the vehicle electrical system, note the fol-
lowing carefully:
● If the jump leads are incorrectly connected, this could result in a short
circuit.
● The vehicles must not touch each other, otherwise electricity could flow
as soon as the positive terminals are connected.
Safety FirstOperating instructionsPractical TipsTechnical Specifications

352Technical specifications
Technical specifications
Checking fluid levels
From time to time, the levels of the different fluids in the ve-
hicle must be checked. Never fill with incorrect fluids, other-
wise serious damage to the engine may be caused.
Fig. 224 Diagram for the location of the various elements Coolant fluid deposit
Engine oil dipstick
Oil filler neck
Brake fluid reservoir
Vehicle battery (underneath a cover)
Windscreen washer fluid reservoir
1
23456
The checking and refilling of service fluids are carried out on the compo-
nents mentioned above. These operations are described in
⇒ page 279.
Overview
Further explanations, instructions and restrictions on the technical data are
contained as of ⇒ page 348

Brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185Brake servo . . . . . . . . . . . . . . . . . . . . . . . . . 189
Electronic parking brake . . . . . . . . . . . . . . 187
Emergency braking function . . . . . . . . . . . 188
Parking brake . . . . . . . . . . . . . . . . . . . . . . . 187
Brake assist systems . . . . . . . . . . . . . . . . . . . . 191
Brake assist system (BAS) . . . . . . . . . . . . . . . . 191
Brake fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193 Specification . . . . . . . . . . . . . . . . . . . . . . . . 194
Brakes Brake assist systems . . . . . . . . . . . . . . . . . 191
Brake fluid . . . . . . . . . . . . . . . . . . . . . . . . . 193
Brake fluid level . . . . . . . . . . . . . . . . . . . . . 194
Brake pads . . . . . . . . . . . . . . . . . . . . . . . . . 189
Changing the brake fluid . . . . . . . . . . . . . . 194
Control lamp . . . . . . . . . . . . . . . . . . . . . . . . 186
Emergency brake indicator in case of sud-den braking . . . . . . . . . . . . . . . . . . . . . . . 317
Running-in brake pads . . . . . . . . . . . . . . . . 189
Warning lamp . . . . . . . . . . . . . . . . . . . . . . . 186
Brake servo . . . . . . . . . . . . . . . . . . . . . . . . 189, 191
Brake system Malfunction . . . . . . . . . . . . . . . . . . . . . . . . 189
Brake systems . . . . . . . . . . . . . . . . . . . . . . . . . 191
Braking assist . . . . . . . . . . . . . . . . . . . . . . . . . . 191 Brake assist system (BAS) . . . . . . . . . . . . . 191
Breakdown Securing the vehicle . . . . . . . . . . . . . . . . . 316
Bulb fault See changing bulbs . . . . . . . . . . . . . . . . . . 330 C
Card compartments . . . . . . . . . . . . . . . . . . . . . 146
Care See "Care of your vehicle" . . . . . . . . . . . . . 246
Vehicle interior . . . . . . . . . . . . . . . . . . . . . . 253
Care of your vehicle Exterior . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246
Caring for paintwork . . . . . . . . . . . . . . . . . . . . . 251
Carrier system . . . . . . . . . . . . . . . . . . . . . . . . . . 140
Catalytic converter . . . . . . . . . . . . . . . . . . . . . . 234 Control lamp . . . . . . . . . . . . . . . . . . . . . . . . 233
Malfunction . . . . . . . . . . . . . . . . . . . . . . . . 234
CD changer . . . . . . . . . . . . . . . . . . . . . . . . 142, 150
Central locking . . . . . . . . . . . . . . . . . . . . . . . 75, 78 Anti-theft alarm . . . . . . . . . . . . . . . . . . . . . . 79
Locking/unlocking the vehicle . . . . . . . . . . 77
Central locking system After airbag deployment . . . . . . . . . . . . . . . 76
Description . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Opening doors individually . . . . . . . . . . . . . 76
Centre armrest . . . . . . . . . . . . . . . . . . . . . . . . . 127
Changing Windscreen wiper blades . . . . . . . . . . . . . 250
Changing a wheel . . . . . . . . . . . . . . . . . . . . . . 310 Changing a wheel . . . . . . . . . . . . . . . . . . . 315
Preparations . . . . . . . . . . . . . . . . . . . . . . . . 310
Raising the vehicle . . . . . . . . . . . . . . . . . . . 313
Wheel bolts . . . . . . . . . . . . . . . . . . . . . . . . . 311
Changing bulbs . . . . . . . . . . . . . . . . . . . . . . . . 330 Bodywork . . . . . . . . . . . . . . . . . . . . . . . . . . 337
Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . 331
Control lamp . . . . . . . . . . . . . . . . . . . . . . . . 330 Front bumper . . . . . . . . . . . . . . . . . . . . . . . 335
Halogen headlights . . . . . . . . . . . . . . . . . . 332
Initial operations . . . . . . . . . . . . . . . . . . . . 331
Number plate light . . . . . . . . . . . . . . . . . . . 339
Rear lid . . . . . . . . . . . . . . . . . . . . . . . . . . . . 336
Sea changing bulbs . . . . . . . . . . . . . . . . . . 330
Tail lights . . . . . . . . . . . . . . . . . . . . . . 336, 337
Xenon headlights . . . . . . . . . . . . . . . . . . . . 334
Changing gear . . . . . . . . . . . . . . . . . . . . . . . . . 176 Automatic gearbox . . . . . . . . . . . . . . . . . . . 180
Engaging gears (manual gearbox) . . . . . . 179
Manual gearbox . . . . . . . . . . . . . . . . . . . . . 179
Manually unlocking the gear selector lever . .323
Selecting gears (automatic gearbox) . . . . 180
Warning and control lamps . . . . . . . . . . . . 177
Changing gears Gear recommendation . . . . . . . . . . . . . . . . 184
Tiptronic . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
Changing the battery of the vehicle key . . . . . . . . . . . . . . . . . . . . . 74
Changing the wheel After changing the wheel . . . . . . . . . . . . . . 315
Checking Tyre pressures . . . . . . . . . . . . . . . . . . . . . . . 302
Checking the oil level . . . . . . . . . . . . . . . . . . . . 285
Check list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Checklist Before working in the engine compart-ment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 281
Changing bulbs . . . . . . . . . . . . . . . . . . . . . 331
In case of an emergency . . . . . . . . . . . . . . 316
363
Index