
Operational problemsFirst read and observe the introductory information and safety warn-
ings
on page 91.
If the cooling system does not operate at outside temperatures higher than +5 °C,
there is a problem in the system. The reasons for this may be.
› One of the fuses has blown. Check the fuse and replace if necessa-
ry » page 236 .
› The cooling system has switched off automatically for a short time because the
coolant temperature of the engine is too hot » page 11.
If you are not able to resolve the operational problem yourself, or if the cooler output has reduced, switch off the cooling system and seek assistance from a
specialist garage.
Auxiliary heating (auxiliary heating and ventilation)
Introduction
This chapter contains information on the following subjects:
Switching on and off directly
98
System settings
98
Radio remote control
99
Conditions for the functioning of auxiliary heating (Aux. heating and ventilation),
hereinafter referred to only as auxiliary heating (Aux. heating).
The charge state of the vehicle battery is sufficient.
The fuel supply is adequate (the warning icon
is not lit in the display of the
instrument cluster).
Auxiliary ventilation
The auxiliary ventilation enables fresh air to flow into the vehicle interior by
switching off the engine, whereby the interior temperature is effectively de-
creased (e.g. with the vehicle parked in the sun).
Auxiliary heating (auxiliary heating)
The auxiliary heating (auxiliary heating) can be used when stationary, when the engine is switched off to preheat the vehicle and also while driving (e.g. during
the heating phase of the engine).
The auxiliary heater (parking heater) functions in connection with the air-condi-
tioning system or Climatronic.
The auxiliary heating (auxiliary heating) also warms up the engine.
The auxiliary heating (parking heating) warms up the coolant by combusting fuel
from the vehicle tank.
The coolant warms up the air, which (if the blower speed is not set to zero) flows into the passenger compartment.WARNING■ The auxiliary heater (independent vehicle heater) must never be operated in
closed rooms (e.g. garages) – risk of poisoning!■
The auxiliary heating (parking heating) must not be allowed to run during re-
fuelling – risk of fire.
■
The exhaust pipe of the auxiliary heating is located underneath the vehicle.
Therefore, if you wish to operate the auxiliary heating (auxiliary heating), do
not park the vehicle in such a way that the exhaust gases can come into con-
tact with highly flammable materials (e.g. dry grass) or easily inflammable sub-
stances (e.g. spilt fuel) – risk of fire.
CAUTION
■ The running auxiliary heating (auxiliary heating) consumes fuel from the vehicle
tank and automatically controls the filling level. If only a low quantity of fuel is
present in the fuel tank, the auxiliary heater switches itself off.■
The exhaust pipe of the auxiliary heating, which is located on the underside of
the vehicle, must not be clogged and the exhaust flow must not be blocked.
■
If the auxiliary heating is running, the vehicle battery discharges. If the auxiliary
heating and ventilation has been operated several times over a longer period, the
vehicle must be driven a few kilometres in order to recharge the vehicle battery.
Note
■ The auxiliary heating only switches the blower on, if it has achieved a coolant
temperature of approx. 50 °C.■
At low outside temperatures, this can result in a formation of water vapour in
the area of the engine compartment. This is quite normal and is not an operating problem.
97Heating and air-conditioning

Radio remote controlFig. 97
Auxiliary heating (aux. heating):
Radio remote control
First read and observe the introductory information and safety warn-
ings on page 97.
Explanation of graphic » Fig. 97
Aerial
Warning light
Turn on auxiliary heating (auxiliary heating)
Turn off auxiliary heating (auxiliary heating)
The transmitter and the battery are housed in the housing of the remote control. The receiver is located in the interior of the vehicle.
The effective range of the radio remote control when the battery is charged is up
to 600 m. Obstacles between the remote control and the vehicle, bad weather
conditions and a weakening battery can reduce the range significantly.
To switch the auxiliary heating (aux. heating) on or off, hold the remote control
vertical, with the aerial
A
» Fig. 97 pointing upwards. The antenna must not be
covered with the fingers or the palm of the hand during this process.
The auxiliary heating can only be switched on/off safely using the radio remotecontrol, if the distance between the radio remote control and the vehicle is at
least 2 m.
ABAfter pressing the button, the warning light in the remote control gives the
user different kinds of feedback:Display warning light B » Fig. 97MeaningLights up green for around 2 seconds.The auxiliary heating has been switch-
ed on.Lights up red for around 2 seconds.The auxiliary heating has been switch-
ed off:Slowly flashes green for around 2 sec- onds.The ignition signal was not received.Quickly flashes green for around 2 sec-
onds.The auxiliary heating is blocked, e. g.
because the tank is nearly empty or
there is a fault in the auxiliary heating.Flashes red for around 2 seconds.The switch off signal was not received.Lights up orange for around 2 seconds,
then green or red.The battery is weak, however the
switching on or off signal was received.Lights up orange for around 2 seconds,
then flashes green or red.The battery is weak, however the
switching on or off signal was not re-
ceived.Flashes orange for around 5 seconds.The battery is discharged, however the
switching on or off signal was not re-
ceived.
Replace the battery » page 231.
CAUTION
The radio remote control comprises electronic components and must therefore be
protected against water, severe impacts and direct sunlight.
99Heating and air-conditioning

Button/di-
al » Fig. 98ActionOperation1Turn downwardsReduce the volume2Press brieflyAccept call, End call
Display telephone's basic menu → Telephone main menu → List of dialled numbers → Call selected contact2Press and hold buttonReject the incoming call3Turn up/downPrevious / next menu item3Press brieflyConfirm selected menu item3Press and hold buttonContinuously display first letter of the phone book3Quickly turn upwardsTo the previous initial letter in the telephone book3Quickly turn downwardsTo the next initial letter in the telephone book4Press brieflyReturn to a previous level in the menu4Press and hold buttonExit telephone menu
Symbols in the MAXI DOT display
First read and observe the introductory information given on page 100.
SymbolImportanceValid forCharge status of the phone battery a)GSM II, GSM IIISignal strengtha)GSM II, GSM IIIA phone is connected with the hands-free system.GSM II, GSM III when connected via the HFP profileThe hands-free system is visible to other devicesGSM II, GSM III when connected via the HFP profileA phone is connected with the hands-free system.GSM III when connected via the rSAP profileThe hands-free system is visible to other devicesGSM III when connected via the rSAP profileA multimedia unit is connected to the hands-free systemGSM II, GSM IIIA UMTS network is availableGSM IIIInternet connection via the hands-free systemGSM III when connected via the rSAP profilea)
This function is only supported by some mobile phones.
102Using the system

Power steeringFirst read and observe the introductory information and safety warn-ings
on page 117.
The power steering enables you to steer the vehicle with less physical force.
The power steering only works when the engine is running. It is still possible to fully steer the vehicle if the power steering fails or if the en-gine is not running (e.g. vehicle being towed in). However, greater physical effort is required to turn the steering wheel.
Starting and stopping the engine using the key
Introduction
This chapter contains information on the following subjects:
Electronic immobiliser
119
Ignition switch
119
Starting the engine
119
Stopping the engine
120
Starting and stopping the engine on vehicles with the KESSY system » page 120.
The engine can only be started with an appropriate original key.
The engine running noises may louder at first be louder for a short time after
starting the cold engine. This is quite normal and is not an operating problem.
WARNING■ When driving without the engine running, the ignition key must always be in
the position 2 » Fig. 105 on page 119 (ignition switched on). This position is
indicated by the illumination of certain indicator lights in the instrument clus-
ter. ■ If the key is not in position 2
, this could lead to unexpected the steering
locking - risk of accident!
■
Only pull the ignition key from the ignition lock when the vehicle has come
to a complete stop (by applying the handbrake). Otherwise, the steering could
be blocked – risk of accident!
■
When leaving the vehicle, the ignition must always be removed. This is par-
ticularly important if children are left in the vehicle. Children could otherwise
start the engine for example – risk of accident or injury!
■
Never leave the vehicle unattended with the engine running.
■
Never switch off the engine before the vehicle is stationary – risk of acci-
dent!
WARNING■ Never leave the engine running in unventilated or closed rooms. The ex-
haust gases from the engine contain substances such as odourless and col-
ourless carbon monoxide (a poisonous gas) – risk to life! ■ Carbon monoxide can cause unconsciousness and death.
CAUTION
■The starter must only be operated when the engine is not running and the vehi-
cle is at a standstill. The starter or engine may be damaged if the starter is activa- ted when the engine is running 3
» Fig. 105 on page 119.
■
Do not tow start the engine – there is a risk of damaging the engine and the
catalytic converter. The battery from another vehicle can be used as a jump-start
aid » page 226 , Jump-starting .
CAUTION
■
Avoid high engine revolutions, full throttle and high engine loads before the en-
gine has reached its operating temperature – risk of damaging the engine!■
Do not switch the engine off immediately at the end of your journey after the
engine has been operated over a prolonged period at high loads but leave it to
run at an idling speed for about 1 minute. This prevents any possible accumulation
of heat when the engine is switched off.
118Driving

For the sake of the environmentDo not warm up the engine while the vehicle is stationary. If possible, start your
journey as soon as the engine has started. Through this the engine reaches its operating temperature more rapidly and the pollutant emissions are lower.
Note
After switching off the ignition, the radiator fan may intermittently continue to
operate for approx. 10 minutes.
Electronic immobiliser
First read and observe the introductory information and safety warn-
ings
on page 118.
An electronic chip is integrated in the head of the key. The immobiliser is deacti-
vated with the aid of this chip when the key is inserted in the ignition lock.
The electronic immobiliser is automatically activated when the ignition key is
withdrawn from the lock.
The engine will not start if a non-authorized ignition key is used.
The following message is shown in the information cluster display.
Immobilizer active.
IMMOBILIZER
Ignition switch
Fig. 105
Positions of the vehicle key in the ignition lockFirst read and observe the introductory information and safety warn-
ings on page 118.
Petrol engines » Fig. 105
Ignition switched off, engine off, the steering can be locked
Ignition switched on
Starting engine
Diesel engines » Fig. 105
Fuel supply interrupted, ignition switched off, engine switched off, the steer-
ing can be locked.
Heating glow plugs on, ignition switched on
Starting engine
To lock the steering , with the ignition key withdrawn, turn the steering wheel
until the steering locking pin engages audibly.
If the steering is locked and it is impossible or difficult to turn the key into posi-
tion
2
» Fig. 105 , move the steering wheel back and forth to unlock the steering.
Note
We recommend locking the steering wheel whenever leaving the vehicle. This
acts as a deterrent against the attempted theft of your car.
Starting the engine
First read and observe the introductory information and safety warn-
ings
on page 118.
Vehicles with a diesel engine are equipped with a glow plug system. The glow
plug warning light
illuminates after the ignition has been switched on. Start
the engine after the warning light
has gone out.
You should not switch on any major electrical components during the heating pe- riod otherwise the vehicle battery will be drained unnecessarily.
Procedure for starting the engine
›
Firmly apply the handbrake.
›
Move the gearshift lever into neutral or move the selector lever into position P
or N.
›
Switch on the ignition
2
» Fig. 105 on page 119.
123123119Starting-off and Driving

WARNING■Never leave the key in the vehicle when you exit the vehicle. This is particu-
larly important if children are left in the vehicle. Otherwise the children could,
for example, start the engine – risk of accident or injury!■
Never leave the vehicle unattended with the engine running.
■
Never switch off the engine before the vehicle is stationary – risk of acci-
dent!
WARNING■ Never leave the engine running in unventilated or closed rooms. The ex-
haust gases from the engine contain substances such as odourless and col-
ourless carbon monoxide (a poisonous gas) – risk to life! ■ Carbon monoxide can cause unconsciousness and death.
CAUTION
■The system can recognize the valid key, even if it has been forgotten, for exam-
ple, in the front of the vehicle roof D » Fig. 14 on page 35 - There is danger of
loss or damage to the key! It is therefore not always necessary to know where
the key is.■
The starter must only be operated when the engine is not running and the vehi-
cle is at a standstill. The starter or engine may be damaged if the starter is activa- ted when the engine is running.
■
Do not tow start the engine – there is a risk of damaging the engine and the
catalytic converter. The battery from another vehicle can be used as a jump-start
aid » page 226 , Jump-starting .
CAUTION
■
Avoid high engine revolutions, full throttle and high engine loads before the en-
gine has reached its operating temperature – risk of damaging the engine!■
Do not switch the engine off immediately at the end of your journey after the
engine has been operated over a prolonged period at high loads but leave it to
run at an idling speed for about 1 minute. This prevents any possible accumulation
of heat when the engine is switched off.
For the sake of the environmentDo not warm up the engine while the vehicle is stationary. If possible, start your
journey as soon as the engine has started. Through this the engine reaches its operating temperature more rapidly and the pollutant emissions are lower.
Note
■ The system is protected against inadvertently switching off the engine while
driving, this means that the engine can only be switched off in an emergen- cy » page 123 .■
After switching off the ignition, the radiator fan may intermittently continue to
operate for approx. 10 minutes.
■
Under certain circumstances (e.g. after switching off the ignition and opening
the driver's door), the steering is enabled only when the ignition is switched on or the engine is started.
Steering lock / unlock
Fig. 106
Starter button
First read and observe the introductory information and safety warn-
ings on page 120.
The steering lock (steering lock) deters attempted theft of your vehicle.
Locking
›
Stop the vehicle.
›
Switch off the engine or the ignition by pressing the starter button » Fig. 106.
›
Open the driver door.
The steering is locked automatically.
121Starting-off and Driving

If the driver's door is opened and the ignition is switched off afterwards, the
steering is only locked after the vehicle is locked.
Unlocking›
Open the driver's door and get into the vehicle.
›
Close the driver's door.
The steering is unlocked within 2 seconds.
If the system does not unlock the steering at the first time (for example when the
front wheels are in contact with an obstacle), then two more unlocking attempts
are performed automatically.
If the steering is still not unlocked, then the following message is displayed on
the display of the instrument cluster.
Move steering wheel!
MOVE STEERING
Slightly move the steering wheel and the system will make up to 3 more attempts
to unlock after 2 seconds. At the same time, the indicator light
flashes.
If the steering is still not unlocked, to try to eliminate the possible cause and then
repeat the unlocking attempt.
Switching on the ignition
First read and observe the introductory information and safety warn-
ings
on page 120.
›
Press the starter button » Fig. 106 on page 121 briefly.
The ignition is switched on.
Note
The ignition is switched on when indicated by the lighting up of certain indicator
lamps in the instrument cluster.Starting the engine
First read and observe the introductory information and safety warn-
ings
on page 120.
Vehicles with a diesel engine are equipped with a glow plug system. The glow
plug warning light illuminates after the ignition has been switched on. Start
the engine after the warning light has gone out.
You should not switch on any major electrical components during the heating pe- riod otherwise the vehicle battery will be drained unnecessarily.
Procedure for starting the engine
›
Firmly apply the handbrake.
›
Move the gearshift lever into neutral or move the selector lever into position P
or N.
›
Depress and hold the clutch pedal (vehicles with a manual gearbox) or brake
pedal (vehicles with an automatic gearbox) until the engine starts.
›
» Fig. 106 on page 121Press and hold 1)
the starter button until the engine starts.
›
Release the handbrake.
Vehicles with manual transmission
The engine will not start if the clutch pedal is not depressed.
The following message is shown in the information cluster display.
Depress clutch to start!
CLUTCH
Vehicles with automatic transmission The engine will not start if the brake pedal is not depressed.
The warning light
lights up in the instrument cluster and the following mes-
sage appears in the display.
Depress brake to start!
BRAKE
1)
On vehicles with the START-STOP system, it is sufficient to press the starter button briefly. The mo-
tor will then automatically start.
122Driving

Defective selector lever lock
If the selector lever lock is defective or its power supply is interrupted (e.g. dis-
charged vehicle battery, blown fuse), the selector lever can no longer be moved
out of position P in the normal manner, and the vehicle can no longer be moved.
The selector lever must be unlocked specially » page 233.
Note
If the gearbox has switched to the emergency programme, visit a specialist ga-
rage.
Running in
Introduction
This chapter contains information on the following subjects:
New engine
129
New tyres
129
New brake pads
130
New engine
First read and observe the introductory information given on page 129.
The engine has to be run in during the first 1 500 kilometres.Up to 1 000 kilometres
›
Do not drive faster than 3/4 of the maximum speed of the gear in use, i.e. 3/4 of
the maximum permissible engine speed.
›
No full throttle.
›
Avoid high engine speeds.
›
Do not tow a trailer.
From 1 000 up to 1 500 kilometres
Gradually increase the power output of the engine up to the full speed of the
gear engaged, i.e. up to the maximum permissible engine speed.
The red scale of the rev counter indicates the range in which the system beginsto limit the engine speed.
During the first operating hours the engine has higher internal friction than later
until all of the moving parts have harmonized. The driving style which you adopt
during the first approx.1 500 kilometres plays a decisive part in the success of
running in your car.
Never drive at unnecessarily high engine speeds, even after the running-in period is complete.
On vehicles fitted with a manual gearbox, at the very latest shift up into the next
gear when the red area is reached. Observe the recommended gear » page 24,
Gear recommendation . Very high engine speeds when accelerating (accelerator)
are automatically restricted »
.
With vehicles with a manual gearbox, do not drive at unnecessarily low engine
speeds. Shift down a gear when the engine is no longer running smoothly. Ob-
serve the recommended gear » page 24, Gear recommendation .
CAUTION
■
The engine is not protected from excessive engine revs caused by shifting
down at the wrong time. This can result in the sudden increase in revs beyond
the permissible maximum rpm and thus cause engine damage.■
Never rev up a cold engine when the vehicle is stationary or when driving in in-
dividual gears.
For the sake of the environment
Do not drive at unnecessarily high engine speeds. Shifting up sooner helps save
on fuel, reduces engine noises and protects the environment.
New tyres
First read and observe the introductory information given on page 129.
New tyres must firstly be “run in”, as they do not offer optimal grip at first. There-fore, drive especially carefully for the first 500 km or so.
129Starting-off and Driving