The vehicle is unlocked.
If the ignition switch cannot be turned on, turn the steering wheel back and
forth slightly to unlock the steering lock.
Turn ignition on / off and start the engine
Fig. 105
Positions of the vehicle key in the ignition lock
Read and observe and on page 103 first.
Positions of the vehicle key in the ignition lock » Fig. 105
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 lever 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 during
starting. The engine can be started after the indicator light goes out.
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. Press the clutch to start.
PRESS CLUTCH
Vehicles with automatic transmission
The engine will not start if the brake pedal is not depressed.
The following message is shown in the information cluster display. Depress the brake to start.
APPLY BRAKE
Note
■ The engine running noises may at first be louder for a short time after start-
ing 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 103 first.
›
Stop the vehicle » page 109, Parking .
›
Turn key to position
1
» Fig. 105 on page 104 .
The engine and the ignition are switched off simultaneously.
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
The radiator fan can intermittently continue to run for approximately 10 mi-
nutes after the ignition has been switched off.104Driving
Start or stop the engine by pressing button
Introduction
Fig. 106
Starter button (
)
This chapter contains information on the following subjects:
Lock / unlock the steering lock
105
Switch ignition on / off
106
Starting the engine
106
Switching off the engine
106
Problems with the engine start
107
The ignition can be switched on and off and the engine can be started / stop-
ped with the starter button » Fig. 106.
The key must be in the vehicle to unlock the steering, start the vehicle 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 and accidents!■
Never leave the vehicle unattended with the engine running - there is a
risk of theft, accident etc.!
■
Never switch off the engine before the vehicle has come to a halt – risk of
accident.
WARNINGNever (e.g. in garages) run the engine in a closed place - risk 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 - risk 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 176.
Note
■
Do not warm up the engine while the vehicle is stationary. If possible, start
your journey as soon as the engine has started. The engine reaches its operat-
ing temperature faster this way.■
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 106 .
Lock / unlock the steering lock
Read and observe
and on page 105 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.
WARNINGNever let the vehicle roll with locked steering lock - risk of accident!105Starting-off and driving
Switch ignition on / offRead and observe
and on page 105 first.
›
Press the button » Fig. 106 on page 105 briefly.
The ignition is switched on or off.
On vehicles fitted with a manual transmission, the clutch pedal must not be
depressed while switching the ignition on or off, otherwise the system would
try to start.
On vehicles fitted with a automatic transmission, the brake pedal must not be
depressed 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 on!
IGNITION STILL ON
When leaving the vehicle always switch off the ignition.
Starting the engine
Read and observe
and on page 105 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. 106 on page 105 briefly – the engine starts au-
tomatically.
In vehicles with diesel engines the glow plug warning light
lights up after
pressing the button. The engine can be started after the indicator 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 105 first.
Switching off
›
Stop the vehicle » page 109, Parking .
›
Press the button » Fig. 106 on page 105 briefly.
The engine and the ignition are switched off simultaneously.
Emergency shutdown
If necessary and in exceptional cases, the engine may even be turned off while driving.
›
Press the starter button » Fig. 106 on page 105 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
The radiator fan can intermittently continue to run for approximately 10 mi-
nutes after the ignition has been switched off.106Driving
NoteThe system can be impaired or may not be available, for example when driving
in “sharp ”curves or with an ESC engagement » page 115.
Proximity warning (dangerous proximity)
Read and observe
and on page 122 first.
If a safe distance to the vehicle ahead is not maintained, the display of the in-
strument cluster shows the symbol
» Fig. 124 on page 122 -
.
Immediately increase the proximity if the current traffic situation allows you
to do so!
The proximity at which the warning is displayed depends on the current speed.
The warning may occur when driving between about 60 km/h and 210 km/h.
Warning and automatic braking
Read and observe
and on page 122 first.
Emergency braking at low speed
In a driving speed range of about 5 km/h to about 30 km/h the automatic brak-
ing action is not preceded by a warning. With an immediate impact hazard au-
tomatic braking is done with the breaking force increasing in stages.
With automatic braking the symbol appears » Fig. 124
on page 122 -
in the
display.
Advance warning
If the system detects a risk of collision, the symbol » Fig. 124
on page 122 -
appears in the display and you will hear an acoustic signal.
At the same time, the braking system is prepared for possible emergency brak- ing.
The pre-warning display can occur in the following situations. › If there is a risk of collision with a moving obstacle in a driving speed range of
about 30 km/h to about 210 km/h.
› There is a risk of a collision with a stationary moving obstacle in a vehicle
speed range of approximately 30 km/h to about 85 km/h.
With a warning the brake pedal must be pressed or the moving obstacle is to
be avoided!
Acute alert
If the driver does not react to the advance warning, the system briefly applies
the brake automatically via an active brake intervention to draw attention to
the potential danger of a collision again.
Automatic Braking
If the driver fails to respond to the acute warning, the system starts to apply
the brakes automatically with increasing stopping power in several stages.
Brake assist
If the driver brakes inadequate with an impending collision, the system auto-
matically increases braking force.
The braking assistance only occurs as long as the brake pedal is being firmly
pressed down.
Note
■ If an automatic brake intervention is triggered by the system, the pressure in
the brake system increases and the brake pedal cannot be operated with the
normal pedal stroke.■
The automatic braking interventions can be cancelled by pressing the accel-
erator pedal or by steering intervention.
Activating/deactivating
Read and observe
and on page 122 first.
The function is automatically activated each time the ignition is switched on.
The system should only be disabled in exceptional cases »
.
The activation or deactivation of the system can be done in one of two ways.
› In the menu item
Assist systemsthe display of the instrument cluster
» page 45 , MAXI DOT display .
› In Infotainment
» Operating instructions for Infotainment , chapter Vehicle
settings (CAR button) .
The following functions can be activated or deactivated separately in infotain-
ment.
› Distance warning
› Advance warning
Upon deactivation of these functions remains disabled even after switching
off and switching on the ignition.
123Assist systems
WARNINGIn the following situations, Front Assistant should be switched off for safe-
ty reasons.■
When the vehicle is being towed away.
■
When the vehicle is on a rolling test bench.
■
If an unfounded warning or a system action was taken.
■
When on a truck, or a car ferry service or similar.
Information messages
Read and observe
and on page 122 first.
The warning symbols are shown in the instrument cluster display. Front Assist: No sensor view.
The sensor is soiled or covered.
Stop the car, switch off the engine and clean the sensor or eliminate the dis-
turbance causing the lack of visibility » Fig. 123 on page 122 .
If the message appears again after starting the engine, the system should be disabled » page 123 . Seek help from a specialist garage.
Front Assist not available.
The system is not available for an unknown reason.
Stop the vehicle, switch off the engine and then start it again.
If the message appears again after starting the engine, the system should be disabled » page 123 . Seek help from a specialist garage.
START-STOP
Introduction
This chapter contains information on the following subjects:
Operating conditions for the system
124
Operation in vehicles with manual gearbox
125
Operation in vehicles with automatic gearbox
125
System conditioned automatic start-up
126
Manually deactivating/activating
126
Information messages
126The START-STOP system (hereinafter referred to just as the system) reduces
fuel consumption and polluting emissions and CO 2 emissions by turning the
engine off, e.g. when stopping at traffic lights, and starting the engine again
when moving off.WARNING■ Never let the vehicle roll with the engine switched off.■The brake servo unit and power steering only operate if the engine is run-
ning.
Operating conditions for the system
Fig. 125
Engine is automatically switched
off / automatic engine cut off is
not possible
Read and observe on page 124 first.
For the system-dependent automatic engine shutdown to operate, the follow-
ing conditions must be met.
The driver's door is closed.
The driver has fastened the seat belt.
The bonnet is closed.
The driving speed exceeded 4 km/h after the last stop.
No trailer is coupled.
Some additional conditions for the system to function cannot be either influ-
enced or recognised by the driver. Therefore, the system can react differently
in situations which are identical from the driver's view.
If, after stopping the vehicle, the check icon
» Fig. 125 appears on the dis-
play, then the conditions for automatic engine shutdown are not met.
Running the engine is essential, for example, for the following reasons.
› The engine temperature for the proper function of the system has not yet
been reached.
› The charge state of the vehicle battery is too low.
124Driving
›The current consumption is too high.
› High air-conditioning or heating capacity (high fan speed, big difference be-
tween the desired and actual indoor temperature).
Information about the current status of the system can be displayed in the In-
fotainment display » operating instructions for Infotainment , chapter Vehicle
settings (CAR button) .
Note
■
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 suitable temperature for proper operation of the sys-
tem.■
If the driver's seat belt is removed for more than approx. 30 seconds or the
driver's door is opened during stop mode, the engine will have to be started
manually.
■
After the manual engine start and with a manual gearbox the automatic en-
gine shutdown can take place only when a minimum distance required for the
system function has been covered.
Operation in vehicles with manual gearbox
Read and observe
on page 124 first.
In compliance with the operating conditions, automatic engine shutdown / au-
tomatic engine start takes place as described.
Automatic engine shut down
›
Stop the vehicle.
›
Shift the gear lever to Neutral.
›
Release the clutch pedal.
Automatic engine shutdown then occurs and the indicator symbol appears in
the display
» Fig. 125 on page 124 .
Automatic engine start
›
Depress the clutch pedal.
The automatic re-start process takes place and the indicator symbol goes
out.
Operation in vehicles with automatic gearbox
Read and observe
on page 124 first.
In compliance with the operating conditions, automatic engine shutdown / au-
tomatic engine start takes place as described.
Automatic engine shut down
›
Bring the vehicle to a stop and depress the brake pedal.
Automatic engine shutdown then occurs and the indicator symbol appears in
the display
» Fig. 125 on page 124 .
Automatic engine start
›
Release the brake pedal.
The automatic re-start process takes place and the indicator symbol goes
out.
Further information on automatic transmission
Engine shut down takes place when the selector lever is in positions P, D/S , N
and in Tiptronic mode.
When the selector lever is in position P, the engine remains shut down even
after you release the brake pedal. The engine starts automatically by pressing
the gas pedal or by moving the selector lever into a different mode and releas-
ing the brake pedal.
If the engine is off due to the automatic and the selector lever is put to the R
position, then the automatic start up of the engine.
If the gear selector is moved from position R to the position D/S or N the vehi-
cle must reach a speed of more than 10 km/h before the automatic engine
shutdown starts.
There is no automatic engine shutdown when the system detects a vehicle
moving due to a large steering angle.
No automatic engine shutdown takes place when the vehicle is moving at low
speed (e.g. during a traffic jam or when turning) and remains stationary after
pressing the brake pedal lightly. Automatic engine shutdown takes place if you
press the brake pedal down with more force.
125Assist systems
System conditioned automatic start-upRead and observe
on page 124 first.
When the engine is off, the system can automatically start the engine before
the desired journey continues. The possible reasons for this are, for example:
› The vehicle has begun to roll, e.g. on a slope.
› The brake pedal has been actuated several times.
› The current consumption is too high.
Manually deactivating/activating
Fig. 126
Button for the START-STOP sys-
tem
Read and observe on page 124 first.
Deactivate/activate
›
Press the button
» Fig. 126 .
When start-stop mode is deactivated, the warning light in the button illumi-
nates.
Note
If the system is automatically deactivated when the engine is turned off, then
the automatic start process takes place.
Information messages
Read and observe
on page 124 first.
The warning symbols are shown in the instrument cluster display. Start the engine manually!
START MANUALLY
One of the conditions for automatic engine start is not satisfied or the driver's
seat belt is not fastened. The engine must be started manually.
On vehicles with the starter button the ignition is turned off by the first press
of the start button, only after pressing for the second time is the start process
initiated.
Error: start-stop system
START STOP ERROR
A system error is present. Seek help from a specialist garage.
Fatigue detection (break recommendation)
Introduction
This chapter contains information on the following subjects:
Function
126
Information messages
127
The fatigue detection system (hereinafter referred to only as system) recom-
mends the driver taking a break from driving when, because of the driver's
steering behaviour, driver fatigue can be detected.
WARNING■ For the driving ability is always the driver's responsibility. Never drive if
you feel tired.■
The system may not detect all cases where a break is needed.
■
Therefore, take regular, sufficient breaks during long trips.
■
There will be no system warning during the so-called micro-sleep.
Note
■ In some situations, the system may evaluate the driving incorrectly and thus
mistakenly recommend a break (e.g. sporty driving, adverse weather condi-
tions or poor road conditions).■
The system is designed primarily for use on motorways.
Function
Read and observe
on page 126 first.
From the start of the journey, the system evaluates steering behaviour. If,
while driving, there have been changes in the steering behaviours that are
evaluated by the system as indicating possible fatigue, a break recommenda-
tion is issued.
126Driving
The system evaluates steering behaviour and recommends a break at speeds
of 65 - 200 km/h.
The system detects a break from driving when one of the following condi-
tions is met.
› The vehicle is stopped and the ignition switched off.
› The vehicle is stopped, the seat belt removed and the driver's door opened.
› The vehicle is stopped for more than 15 minutes.
If none of these conditions are met or if the driving style is not changed, the
system recommends a driving break again after 15 minutes.
The system can be activated/deactivated in the Infotainment » operating in-
structions for Infotainment , chapter Vehicle settings (CAR button) .
Information messages
Read and observe
on page 126 first.
The icon appears and the following message for a few seconds in the display
of the instrument cluster .
Fatigue detected. Take a break!
DRIVER ALERT TAKE A BREAK
An audible signal is also emitted.
Tyre pressure monitoring
Introduction
This chapter contains information on the following subjects:
Save tyre pressure values
127
Save tyre pressure values and infotainment display
128
Save tyre pressure values by pressing a button
128
The tyre pressure monitoring function monitors (hereinafter referred to only as
a system) the tyre pressure while driving.
When changing the tyre inflation pressure, the warning light illuminates in
the instrument cluster and an audible signal is heard.
Information on the procedure for the indication of change in tyre pressure val- ues » page 37 .
The system can only function properly if the tyres have the prescribed tyre
pressure and this pressure values are stored in the system.
WARNING■ The correct tyre pressure values is always the driver's responsibility. The
tyre pressure should be checked regularly » page 162.■
The system cannot warn in case of very rapid loss of tyre pressure, e.g. in
the event of a sudden puncture.
Save tyre pressure values
Read and observe
on page 127 first.
The tyre pressure valuesare always stored in the system, if one of the follow-
ing events is present.
› Change of tyre pressure values.
› Change one or more wheels.
› Change in position of a wheel on the vehicle.
› The warning light
in the instrument cluster.
The storage of the tyre pressure values depends on equipment, either in the
infotainment or by pressing a button.
WARNINGBefore storing the tyre pressures they must be inflated to the specified in-
flation pressure » page 162. If incorrect pressure values are storedthe sys-
tem may not warn even with a tyre pressure that is too low.
CAUTION
The tyre pressure values should be stored every 10 000 km or once a year to
ensure proper system function.127Assist systems