
3
- start engine
Applies to all models:
Position 1 To
lock the steering , with the ignition key withdrawn, turn the steering wheel un-
til the steering locking pin is heard to engage. You should always lock the steering
as a general rule if you leave your vehicle. This acts as a deterrent against possible
theft of your vehicle ⇒ .
Position 2 Move the steering wheel back and forward a little if the ignition key cannot, or
cannot easily be turned into this position, in order to release the steering lock.
Position
3 The engine is started in this position. At the same time, major electrical compo-
nents are switched off for short periods. The ignition key moves back into position
2 when one releases the key.
The ignition key must be turned back into position 1 each time before starting
the engine again. The starter repeat lock in the ignition lock prevents the starter
being engaged when the engine is running and thus getting damaged.
Ignition key withdrawal lock (automatic gearbox)
You can only withdraw the ignition key after switching off the ignition if the selec-
tor lever is in position P.WARNING
● When driving, the ignition key must always be in the position 2 (ignition
switched on) without the engine running. This position is indicated by the
warning lights coming on. If this is not the case, it could result in unexpected
locking of the steering wheel - risk of accident!
● Only remove the ignition key from the ignition lock when the vehicle has
come to a standstill (by applying the handbrake or moving the selector lever
into the position
P). The steering lock can engage immediately - risk of acci-
dent!
● Always withdraw the ignition key if you are going to leave the vehicle,
even for a short time. This is particularly important if children are left in the
vehicle. The children might otherwise start the engine or switch on electrical
equipment (e.g. power windows) - risk of accident or injury! Starting the engine
General You can only start the engine only using an original ignition key.
Manual gearbox
– Place the gearshift lever into neutral and put on the handbrake firmly before
starting the engine.
– Engage the clutch pedal and keep it depressed until the engine starts.
If you start the engine without depressing the clutch pedal, the engine does not
start and the following message appears in the Information display Depress
clutch! (Depress clutch!)
or CLUTCH in the display of the instrument cluster.
– Let go of the key as soon as the engine starts otherwise there may be damage
to the starter.
Automatic gearbox
– Place the gearshift lever into P or N before starting the engine, and apply the
handbrake firmly.
– Let go of the key as soon as the engine starts otherwise there may be damage
to the starter.
The engine running noises may louder at first be louder for a short time after
starting the cold engine until oil pressure can be built up in the hydraulic valve
clearance compensation. This is quite normal and is not an operating problem.
If the engine does not start ...
You can use the battery of another vehicle as a jump-start aid ⇒
page 216. WARNING
● Never run the engine in non ventilated or enclosed areas. The exhaust
gases of the engine contain besides the odorless and colourless carbon mon-
oxide a poisonous gas - hazard! Carbon monoxide can cause unconsciousness
and death.
● Never leave your vehicle unattended with the engine running. £100
Starting-off and Driving

CAUTION
● The starter may only be operated (ignition key position 3 ), if the engine is not
running. If the starter is immediately operated after switching off the engine, the
starter or the engine can be damaged.
● Avoid high engine revolutions, full throttle and high engine loads as long as
the engine has not yet reached its normal operating temperature - risk of damag-
ing the engine!
● Do not tow start the engine - danger of damaging the engine. On vehicles with
a catalytic converter, unburnt fuel may get into the catalytic converter where it
may ignite. This in turn may damage or destroy the catalytic converter. You can
use the battery of another vehicle as a jump-start aid ⇒ page 216, Jump-starting
.For the sake of the environment
Never warm up the engine when the vehicle is standing. Drive off right away.
Through this the engine reaches its operating temperature more rapidly and the
pollutant emissions are lower.
Petrol engines These engines are fitted with a starter system which selects the correct fuel-air
mixture for every external air temperature.
●
Do not operate accelerator before and when starting engine.
● Interrupt the attempt at starting after 10 seconds if the engine does not start
right awayand wait for about 30 seconds before repeating the attempt.
● It is possible that the fuse on the electrical fuel pump is defect if the engine
still does not start. Check the fuse and replace it if necessary ⇒ page 220.
● Contact the nearest specialist garage to obtain professional assistance.
It may be necessary, if the engine is very hot, to slightly depress the accelerator
after the engine has started.
Diesel engines Glow plug system
Diesel engines are equipped with a glow plug system, the preglow period being
controlled automatically in line with the coolant temperature and outside temper-
ature.
The preglow indicator light comes on after the ignition has been switched on. You should not switch on any major electrical components during the heating
period otherwise the vehicle battery will be drained unnecessarily.
● You should start the engine immediately after the glow plug warning light
has gone out.
● The glow plug warning light will come on for about one second if the engine is
at a normal operating temperature or if the outside temperature is above +5 °C.
This means that you can start the engine right away.
● Interrupt the attempt at starting after 10 seconds if the engine does not start
right away and wait for about 30 seconds before repeating the attempt.
● It is possible that the fuse on the diesel preglow system is defect if the engine
still does not start. Check the fuse and replace it if necessary ⇒ page 220.
● Contact the nearest specialist garage to obtain professional assistance.
Starting the engine after the fuel tank has run dry
It may take longer than normal to start the engine after refuelling if the fuel tank
has run completely dry - up to one minute. This is because the fuel system must
first of all be filled while the attempting to start the engine.
Switching off the engine –
The engine can be switched off by turning the ignition key into position 1 ⇒
fig. 96 . WARNING
● Never switch off the engine before the vehicle is stationary - risk of acci-
dent!
● The brake booster only operates when the engine is running. Greater
physical effort for braking is required when engine is switched off. Because if
you do not stop as normal, this can cause an accident and severe injuries. CAUTION
you should not switch the engine off right away at the end of your journey after
the engine has been operated for a lengthy period at high loads but should be al-
lowed it to run at idling speed for about 2
minutes. This prevents any accumula-
tion of heat when the engine is switched off. £ 101
Starting-off and Driving Using the system Safety Driving Tips General Maintenance Breakdown assistance Technical data

The pressure in the brake system is sufficient.
The difference between the outdoor- and the set temperature in the interior is
not too great.
The vehicle speed since the last time the engine was switched off was greater
than 3 km/h.
No cleaning of the diesel particle filter takes place
⇒ page 24The front wheels are not turned excessively (the steering angle is less than 3/4
of a steering wheel revolution). Conditions for an automatic restart (start phase)
The clutch is pressed.
The max./min. temperature is set.
The Defrost function for the windscreen is switched on.
A high blower stage has been selected.
The “START STOP” button is pressed.
Conditions for an automatic restart without driver intervention
The vehicle moves at a speed of more than 3 km/h.
The difference between the outdoor- and the set temperature in the interior is
too great.
The charge state of the vehicle battery is not sufficient.
The pressure in the brake system is not sufficient.
Messages in the instrument cluster display (valid for vehicles without
Information display) ERROR: START STOP
Error in the START-STOP system
START STOP NOT POSSIBLE Automatic engine shut down is not
possible
START STOP ACTIVE Automatic engine shut down (stop
phase)
SWITCH OFF IGNITION
Switch off the ignition
START MANUALLY
Start the engine manually WARNING
● The brake servo unit and power steering only operate if the engine is run-
ning.
● Never let the vehicle roll with the engine switched off. CAUTION
If the “START-STOP” system is used at very high outside temperatures over a very
long period of time, the vehicle battery can be damaged. Note
● Changes to the outdoor temperature can have an effect on the internal tem-
perature of the vehicle battery even after several hours. If the vehicle remains
outdoors for a long time in minus temperatures or in direct sunlight, it can take
several hours until the internal temperature of the vehicle battery reaches a suita-
ble temperature for proper operation of the
“START STOP” system.
● In some instances it may be necessary to start the engine manually with the
ignition key (e.g. when the seat belt is not inserted or the driver's door is opened
for more than 30 seconds). Follow the messages in the instrument cluster display.
● If the Climatronic is running in automatic mode, under certain conditions, the
engine may not switch off automatically. 111
Starting-off and Driving Using the system Safety Driving Tips General Maintenance Breakdown assistance Technical data

Working in the engine compartment
Particular care is required when carrying out any work in the en-
gine compartment!
There is a risk of injuries, scalding, accidents and fire when working in the en-
gine compartment, e.g. inspecting and replenishing oil and other fluids. For this
reason, it is essential to comply with the warning instructions stated below and
with the general applicable rules of safety. The engine compartment of your car
is a hazardous area ⇒
.
WARNING
● Never open the bonnet if you see that steam or coolant is flowing out of
the engine compartment - risk of scalding! Wait long enough until the steam
or coolant has stopped escaping.
● Switch off the engine and pull out the ignition key.
● Apply the handbrake firmly.
● If your vehicle is fitted with a manual gearbox, move the gearshift lever in-
to Neutral, or if it is fitted with automatic gearbox, move the selector lever in-
to position
P.
● Allow the engine to cool down.
● Keep children clear of the engine compartment.
● Do not touch any hot engine parts - risk of burns!
● Never spill oil and other fluids over the hot engine. Such fluids (e.g. the an-
tifreeze contained in the coolant) may ignite!
● Avoid short circuits in the electrical system - particularly on the battery.
● Never place your hand into the radiator fan as long as the engine is still
warm. The fan might suddenly start running!
● Never open the cap of the coolant expansion reservoir so long as the en-
gine is still warm. The cooling system is pressurized!
● Cover over the cap of the reservoir with a large cloth when opening it as
protection for your face, hands and arms from hot steam or hot coolant.
● Do not let objects, such as e.g cleaning cloth or tools lie in the engine com-
partment. WARNING (Continued)
● If you wish to work under the vehicle, you must secure the vehicle from
rolling away and support it with suitable supporting blocks: the car jack is not
sufficient for this - risk of injury!
● In cases where it be necessary to carry out inspection work when the en-
gine is running there is an additional risk from rotating parts (e.g. the V-ribbed
belt, alternator, radiator fan) and from the high-voltage ignition system.
Please observe in addition the following:
–Never touch the electrical cables of the ignition system.
– Absolutely avoid any jewellery, loose items of clothing or long hair from
getting into the rotating parts of the engine - Hazard! Therefore remove
any jewellery beforehand, tie up your hair and wear tight fitting clothing.
● Please also comply with the warning instructions stated below when car-
rying out any essential work on the fuel system or on the electrical system:
–Always separate the car battery from the electrical system.
– Do not smoke.
– Never carry out any work close to naked flames.
– Always keep a working fire extinguisher at hand. CAUTION
When replenishing fluids in the engine, always ensure that the fluids are on no ac-
count mixed up. This may result in major operating problems and also vehicle
damage! 190
Inspecting and Replenishing

Index
A
Abroad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
ABS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157 Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
Active driver-steering recommendation . . . . . . . . 155
Adjusting seats . . . . . . . . . . . . . . . . . . . . . . . . 61, 68, 129 electrically . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Adjusting the seat backrest . . . . . . . . . . . . . . . . . . . . 67
Adjusting the steering wheel . . . . . . . . . . . . . . . . . . 99
Airbag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137 Deployment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
Front airbag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
Head airbag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143
Knee airbag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
Side airbag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Airbag system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137 Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Air conditioning system . . . . . . . . . . . . . . . . . . . . . . . 89 Air outlet vents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Recirculated air mode . . . . . . . . . . . . . . . . . . . . . . . . 91
Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Alternator Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Anti-theft alarm system . . . . . . . . . . . . . . . . . . . . . . . 38
Antilock brake system . . . . . . . . . . . . . . . . . . . . . . . . 157
Antilock brake system (ABS) Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Ashtray . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Assigning the remote control key to the memory buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Auto Check Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Auto Computer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Automatic driving lamp control . . . . . . . . . . . . . . . . . 46 Automatic gearbox
Emergency programme . . . . . . . . . . . . . . . . . . . . . . 115
Kickdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
Selector lever-emergency unlocking . . . . . . . . . . 116
Tiptronic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Automatic gearbox DSG . . . . . . . . . . . . . . . . . . . . . . . 112
Automatic rear window wiper . . . . . . . . . . . . . . . . . . 56
Automatic seat adjustment . . . . . . . . . . . . . . . . . . . . 64
Automatic vehicle wash systems . . . . . . . . . . . . . . . 181
Automatic wiper/washer system . . . . . . . . . . . . . . . 54
AUX-IN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Avoiding damage to your vehicle . . . . . . . . . . . . . . 167
B Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29, 196 change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199
Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198
Operation in winter . . . . . . . . . . . . . . . . . . . . . . . . . 198
Before setting off . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
Belt Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Belt tensioners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Bonnet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189
Boot lid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Brake Handbrake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Brake Assist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
Brake booster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
Brake fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
Bulbs Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Button for the central locking system . . . . . . . . . . . 35 Button in the driver's door
Power windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
C Car jack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208, 212
Car state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Catalytic converter . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
CD changer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
Central locking system . . . . . . . . . . . . . . . . . . . . . . . . 33 lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
unlock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
Changing a wheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209
Changing bulbs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223
Changing wheels around . . . . . . . . . . . . . . . . . . . . . 203
Charging the battery . . . . . . . . . . . . . . . . . . . . . . . . . 198 Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Check engine oil level . . . . . . . . . . . . . . . . . . . . . . . . . 191
Child safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146 Side airbag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
Child safety lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Child safety seat on the front passenger seat . . . . . . . . . . . . . . . . . 147
Safety information . . . . . . . . . . . . . . . . . . . . . . . . . . 146
Child seat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148 Classification into groups . . . . . . . . . . . . . . . . . . . . 148
ISOFIX system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
Use of child safety seats . . . . . . . . . . . . . . . . . . . . . 149
Chrome parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
Cigarette lighter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
Climatronic Defrosting windows . . . . . . . . . . . . . . . . . . . . . . . . . 95
Recirculated air mode . . . . . . . . . . . . . . . . . . . . . . . 94
Climatronic (automatic air conditioning) . . . . . . . . . 92
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 240
Index