
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 operat-
ing problem.
■
So that warm air can flow into the vehicle interior after switching on the aux.
heating, you must maintain the comfort temperature normally selected by you,
leave the fan switched on and leave the air outlet vents in open. It is recom-
mended to put the air flow in the position
or
.
Switching on/off
Fig. 140
Button for direct power on / off of the auxiliary heating (heating
and ventilation) on the front panel of the Climatronic / manual air condi-
tioning
Read and observe
and on page 117 first.
The auxiliary heating (heating and ventilation) (hereinafter referred to as a
heater) can be switched on and off as follows.
Switching on
▶ Manually with the symbol key on the front panel of the Climatronic or the
manual air conditioning » Fig. 140.
▶ Manually with the symbol key on the radio remote control.
▶ Via an automatically programmed and activated pre-set time in the Infotain-
ment.
▶ Automatically according to the ambient conditions »
.
Switching off
▶ Manually with the symbol key on the front panel of the Climatronic or the
manual air conditioning » Fig. 140.
▶ Manually with the symbol key
on the radio remote control.
▶ Via an automatically programmed and activated pre-set time in the Infotain-
ment.
▶ Automatically when the warning light
in the instrument cluster illumi-
nates.
▶ Automatically according to the ambient conditions »
.
After switching the system off, the auxiliary heating will continue running a lit-
tle while longer in order to burn the remaining fuel in the auxiliary heater.
After switching off, coolant pump still runs for a short period.
Programming the auxiliary heating in the Infotainment
For vehicles with Climatronic: on the front panel of the Climatronic, press but-
ton
→
.
For vehicles with manual air conditioning: on the Infotainment, press button
→
.
When automatic switching on is activated, the indicator light in the symbol key
lights up
» Fig. 140 for about 10 seconds after the ignition is turned off.
CAUTION
The automatic switching on and off the heating for rapid heating of the vehicle
interior can be disabled in the Infotainment » Owner´s Manual Infotainment ,
chapter Setting the heating and the cooling system .118Using the system

Radio remote controlFig. 141
Radio remote control
Read and observe and on page 117 first.
Using the radio remote control, the aux. heating and ventilation (hereinafterreferred to as heater) can be switched on or off.
Function and description of the radio remote control » Fig. 141
Warning light
Aerial
Switch on the auxiliary heating
Switch off the auxiliary heating
To switch the auxiliary heating on or off, hold the remote control vertically,
with the aerial
B
» Fig. 141 pointing upwards. The antenna must not be cov-
ered 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 re-
mote control, if the distance between the radio remote control and the vehicle
is at least 2 m.
After pressing the button, the warning light in the remote control gives the
user different kinds of feedback.
Display warning light A » Fig. 141MeaningLights up green for around 2 seconds.The auxiliary heating has been
switched on.Lights up red for around 2 seconds.The auxiliary heating has been
switched off.Slowly flashes green for around 2 sec-
onds.The ignition signal was not received.ABDisplay warning light A » Fig. 141MeaningQuickly flashes green for around 2
seconds.The auxiliary heating is blocked, e. g
because the tank is nearly empty or
there is a fault in the auxiliary heat-
ing.Flashes red for around 2 seconds.The switch off signal was not re-
ceived.Lights up orange for around 2 sec-
onds, then green or red.The battery is weak, however the
switching on or off signal was re-
ceived.Lights up orange for around 2 sec-
onds, 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
received.
Replace the battery » page 223.
CAUTION
■
The radio remote control comprises electronic components and must there-
fore be protected against water, severe impacts and direct sunlight.■
When the battery is fully charged, the range of the remote control is a few
hundred metres. Obstacles between the radio remote control and the vehicle,
bad weather conditions and a weaker battery can clearly reduce the range.
119Heating and ventilation

Driving
Starting-off and Driving
Starting and stopping the engine using the key
Introduction
This chapter contains information on the following subjects:
Electronic immobilizer
120
Steering lock locking / unlocking
120
Turning ignition on/off and starting the engine
121
Stopping the engine
121
With the key in the ignition, the ignition can be switched on and off and the
engine can be started / stopped.
WARNING■ While driving with the engine stopped, the ignition must always be
switched on » page 121, Turning ignition on/off and starting the engine .
■ With the ignition off, the steering may lock » page 120 - danger of an
accident!■
Do not withdraw the ignition key from the ignition lock until the vehicle
has come to a stop » page 128, Parking . Otherwise, the steering may lock -
danger of an accident!
■
Never leave the key in the vehicle when you exit the vehicle. Unauthor-
ized persons such as children could lock the car, turn on the ignition or start
the engine -risk of injury, accidents and damage!
■
Never leave the vehicle unattended with the engine running - there is
risk of accident, damage or theft!
■
Never switch off the engine before the vehicle is stationary – risk of acci-
dent!
WARNING■ Never (e.g. in garages) run the engine in a closed place - there is the dan-
ger of poisoning and death!■
Do not leave any items (e.g. cloths or tools) in the engine compartment.
This presents a fire hazard and the risk of engine damage.
■
Never cover the engine with additional insulation material (e.g. with a
blanket) – risk of fire!
CAUTION■ Only start the engine when the engine and the vehicle are stationary - there
is a danger of starter and engine damage!■
Do not push-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 219.
Note
Do 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 rea-
ches its operating temperature faster.
Electronic immobilizer
Read and observe
and on page 120 first.
The electronic immobiliser (hereinafter referred to as immobiliser) makes theattempted theft or unauthorised use of your vehicle more difficult.
An electronic chip is integrated in the head of the key. The immobiliser is deac-
tivated with the aid of this chip when the key is inserted in the ignition lock.
As soon as the ignition key is removed from the ignition lock, the immobiliser is
automatically activated.
Operational problems
If a component in the immobiliser key fails, it is not possible to start the en-
gine. A corresponding message appears in the display of the instrument clus-
ter to explain the immobiliser is active.
To start, use the other vehicle key or seek help from a specialist garage.
Steering lock locking / unlocking
Read and observe
and on page 120 first.
The steering lock (steering lock) deters any attempted theft of your vehicle.
Locking
›
Withdraw the ignition key.
›
Turn the steering wheel to the left or right until the steering lock clicks into
place.
Unlocking
›
Insert the key into the ignition lock.
120Driving

›Switch on the ignition
» page 121.
The steering column lock is unlocked.
If the ignition switch can not be turned on, then turn the steering wheel back and forth slightly and thereby unlock the steering lock.
Turning ignition on/off and starting the engine
Fig. 142
Positions of the vehicle key in the ignition lock
Read and observe and on page 120 first.
Positions of the vehicle key in the ignition lock » Fig. 142
Ignition switched off, engine switched off
Ignition switched on
Starting engine
Switching ignition on/off
›
Turn key to position
2
.
The ignition is switched on.
›
Turn key to position
1
.
The ignition is switched off.
Procedure for starting the engine
›
Firmly apply the handbrake.
›
For vehicles with manual transmission , shift gear stick to neutral, depress
the clutch pedal and hold it there until the engine starts.
›
On vehicles with automatic transmission , place the selector lever in position
P or N and depress the brake pedal until the engine starts.
›
Turn the key into position
3
as far as it will go - the engine's starting proce-
dure will commence (do not touch the accelerator).
›
Release the key, the engine will start automatically.
After letting go, the vehicle key will return to position
2
.
123If the engine does not start within 10 seconds, turn the key to position 1. Re-
peat the start-up process after approx. half a minute.
For vehicles with diesel engines, the glow plug warning light
goes on dur-
ing starting. The engine starts after the warning light goes out.
Note
■ 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.■
You should not switch on any major electrical components during the heat-
ing period otherwise the vehicle battery will be drained unnecessarily.
Stopping the engine
Read and observe
and on page 120 first.
›
Stop the vehicle » page 128, Parking .
›
Turn key to position
1
» Fig. 142 on page 121 .
The engine and the ignition are switched off simultaneously.
For vehicles with automatic transmission, the ignition key can only be removed if the selector lever is in position P .
CAUTION
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 accumula-
tion of heat when the engine is switched off.
Note
After switching off the ignition, the radiator fan may intermittently continue to
operate for approx. 10 minutes.121Starting-off and Driving

Starting and stopping the engine at the push of the button
Introduction
Fig. 143
Starter button (
)
This chapter contains information on the following subjects:
Steering column lock locking / unlocking
122
Switching ignition on / off
123
Starting the engine
123
Switching off the engine
123
Problems starting the engine
124
The ignition can be switched on and off and the engine can be started/stop-
ped with the starter button » Fig. 143.
The key must be in the vehicle in order to unlock the steering wheel, switch on the ignition, start the engine and drive.
WARNING■ Never leave the key in the vehicle when you exit the vehicle. Unauthor-
ized persons such as children could lock the car, turn on the ignition or start
the engine -risk of injury, accidents and damage!■
Never leave the vehicle unattended with the engine running - there is a
risk of theft etc!
■
Never switch off the engine before the vehicle is stationary – risk of acci-
dent!
WARNINGNever (e.g. in garages) run the engine in a closed place - there is the danger
of poisoning and death!CAUTION■ The system can recognize the valid key, even if it has been accidentally left
on the vehicle roof - there is danger of loss or damage to the key!■
Only start the engine when the engine and the vehicle are stationary - there
is a danger of starter and engine damage!
■
Do not push-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 219.
Note
■
Do 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 rea-
ches its operating temperature faster.■
The system is protected against inadvertently switching off the engine while
driving, this means that the engine can only be switched off in an emergency
» page 123 .
Steering column lock locking / unlocking
Read and observe
and on page 122 first.
The steering lock (steering lock) deters any attempted theft of your vehicle.
Locking
›
Switch off the engine.
›
Open the driver door.
The steering lock is locked automatically.
If the driver's door is opened and the ignition is switched off afterwards, the
steering is only locked after the vehicle has been locked.
Unlocking
›
Open the driver's door and get into the vehicle.
›
Close the driver's door.
The steering is locked automatically.
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.
122Driving

WARNINGNever let the vehicle roll with locked steering lock - there is a risk of acci-
dent!
Switching ignition on / off
Read and observe
and on page 122 first.
›
Press the button » Fig. 143 on page 122 briefly.
The ignition is switched on or off.
On vehicles fitted with a manual gearbox, the clutch pedal must not be de-
pressed while switching the ignition on or off, otherwise the system would try
to start.
On vehicles fitted with a automatic gearbox, the brake pedal must not be de-
pressed while switching the ignition on or off, otherwise the system would try
to start.
If the driver's door is opened while the ignition is on, an audible signal sounds
and the following message appears in the instrument cluster display.
Ignition switched on.IGNITION STILL ON
When leaving the vehicle always switch off the ignition.
Starting the engine
Read and observe
and on page 122 first.
Procedure for starting the engine
›
Firmly apply the handbrake.
›
For vehicles with manual transmission , shift gear stick to neutral, depress
the clutch pedal and hold it there until the engine starts.
›
On vehicles with automatic transmission , place the selector lever in position
P or N and depress the brake pedal until the engine starts.
›
Press the starter button » Fig. 143 on page 122 briefly – the engine starts au-
tomatically.
In vehicles with diesel engines after pressing the button, the glow plug warn-
ing light lights up. The engine starts after the warning light goes out.
Note■
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.■
You should not switch on any major electrical components during the heat-
ing period otherwise the vehicle battery will be drained unnecessarily.
Switching off the engine
Read and observe
and on page 122 first.
Switching off
›
Stop the vehicle » page 128, Parking .
›
Press the button » Fig. 143 on page 122 briefly.
The engine and the ignition are switched off simultaneously.
Emergency shut-down
If necessary and in exceptional cases, the engine may even be turned off while
driving.
›
Press the starter button » Fig. 143 on page 122 for longer than 1 second or
twice within 1 second.
After the emergency stop of the engine, the steering lock will remain un-
locked.
CAUTION
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 accumula-
tion of heat when the engine is switched off.
Note
After switching off the ignition, the radiator fan may intermittently continue to
operate for approx. 10 minutes.123Starting-off and Driving

Manually deactivating/activating the systemFig. 146
Button for the START-STOP sys-
tem
Deactivating/activating
›
Press the symbol button
» Fig. 146 .
When system is deactivated, the warning light in the button illuminates.
If the system is turned off, it will be automatically reactivated after turning the
ignition off and on.
Note
■ If the system is deactivated when the engine is turned off automatically,
then the automatic start process takes place.■
Selecting the driving mode Eco when the system is deactivated will automat-
ically activate the system » page 157, Selection of the driving mode (Driving
Mode Selection) .
Information messages
The information messages are shown in the instrument cluster display.
Start the engine manually!START MANUALLY
If for example the driver's seat belt is stored, the engine must be started man-
ually.
On vehicles with the starter button, the ignition is turned off by the first press
of the starter button; the start process is only initiated when the button is
pressed for the second time.
Error: start-stop systemSTART STOP ERROR
A system error is present. Seek help from a specialist garage.
Brakes and parking
Introduction
This chapter contains information on the following subjects:
Information on braking
126
Handbrake
127
Parking
128WARNING■ Greater physical effort for braking is required when the engine is switch-
ed off – risk of accident!■
During the braking procedure on a vehicle with manual transmission,
when the vehicle is in gear and at low revs, press the clutch pedal. Other-
wise, the functionality of the brake system may be impaired – risk of acci-
dent!
■
When leaving the vehicle never leave persons leave unattended in the
vehicle who could release the brake. The vehicle might then move off – risk of accident!
■
Observe the recommendations on the new brake pads » page 132.
CAUTION
Never let the brakes slip with light pressure on the pedal if braking is not nec-
essary. This causes the brakes to overheat and can also result in a longer brak-
ing distance and excessive wear.
Information on braking
Read and observe
and on page 126 first.
Wear-and-tear
The wear of the brake pads is dependent on the operating conditions and driv-
ing style.
The brake pads wear more quickly if a lot of journeys are completed in towns
and over short distances or if a very sporty style of driving is adopted.
If operated under severe conditions , the thickness of the brake pads must be
checked by a specialist garage between service appointments as well.
126Driving

Wet roads or road salt
The performance of the brakes can be delayed as the brake discs and brake
pads may be moist or have a coating of ice or layer of salt on them in winter.
The brakes are cleaned and dried by applying the brakes several times »
.
Corrosion
Corrosion on the brake discs and dirt on the bake pads occur if the vehicle has
been parked for a long period and if you do not make much use of the braking
system. The brakes are cleaned by applying the brakes several times »
.
Long or steep slopes
Before travelling a long distance with a steep gradient, reduce speed and shift
into the next lowest gear. As a result, the braking effect of the engine will be
used, reducing the load on the brakes. Any additional braking should be com-
pleted intermittently, not continuously.
Emergency brake display
If the brakes are applied in full and the vehicle systems evaluate the situation
as dangerous for the traffic following behind, the brake light flashes automati-
cally.
After the speed was reduced below around 10 km/h or the vehicle was stop-
ped, the brake light stops flashing and the hazard warning light system
switches on. The hazard warning light system is switched off automatically af-
ter accelerating or driving off again.
Faults in the brake surface
If it is found that the braking distance has suddenly become longer and that
the brake pedal can be depressed further, the brake system may be faulty.
Visit a specialist garage immediately and adjust your style of driving appropri-
ately, as you will not know the exact extent of the damage.
Low brake fluid level
An insufficient level of brake fluid may result in problems in the brake system.
The level of the brake fluid is monitored electronically » page 32,
Brake sys-
tem .
Brake booster
The brake booster increases the pressure generated with the brake pedal. The
brake booster only operates when the engine is running.
WARNINGOnly apply the brakes for the purpose of drying and cleaning the brake
discs if the traffic conditions permit this. Do not place any other road users
in jeopardy.
Handbrake
Fig. 147
Handbrake
Read and observe and on page 126 first.
The hand brake is used when stopping and parking for securing the vehicle
against unwanted movement.
Apply
›
Pull the handbrake lever firmly upwards.
Release
›
Pull the handbrake lever up slightly and at the same time push in the lock
button » Fig. 147 .
›
Move the lever right down while pressing the lock button.
The handbrake warning light
lights up when the handbrake is applied, pro-
vided the ignition is on.
A warning signal sounds if the vehicle is inadvertently driven off with the
handbrake applied.
The following message is shown in the information cluster display.
Release the handbrake!RELEASE HANDBRAKE
The handbrake warning is activated if the vehicle is driven at a speed of more
than around 5 km/h for more than 3 seconds.
127Starting-off and Driving