Alarm system
The concept
When the vehicle is locked, the vehicle alarm
system responds to:▷Opening a door, the hood or the tailgate.▷Movements in the vehicle interior▷Changes in the vehicle tilt, e. g., during at‐
tempts at stealing a wheel or when towing
the car.▷Disconnected battery voltage.
The alarm system briefly signals tampering:
▷Acoustic alarm.▷By switching on the hazard warning system.▷By flashing the daytime running lights.
Arming and disarming the alarm system
When you lock or unlock the vehicle, either
with the remote control or via the Comfort Ac‐
cess, the alarm system is armed or disarmed at
the same time.
Door lock and armed alarm system
The alarm system is triggered when the door is
opened, when the vehicle is unlocked via the
door lock.
Switching off the alarm, refer to page 44.
Tailgate and armed alarm system The tailgate can be opened even when the
alarm system is armed.
After the tailgate is closed, it is locked and
monitored again when the doors are locked.
The hazard warning system flashes once.
Panic mode
You can trigger the alarm system if you find
yourself in a dangerous situation.
Press button on the remote control for
at least 3 seconds.
To reel off the alarm: press any button.
Indicator lamp on the interior rearview
mirror▷The indicator lamp flashes briefly every
2 seconds:
The system is armed.▷The indicator lamp flashes after locking:
The doors, hood or tailgate is not closed
properly, but the rest of the vehicle is se‐
cured.
After 10 seconds, the indicator lamp flashes
continuously. Interior motion sensor and tilt
alarm sensor are not active.
When the still open access is closed, interior
motion sensor and tilt alarm sensor will be
switched on.▷The indicator lamp goes out after unlock‐
ing:
The vehicle has not been tampered with.▷The indicator lamp flashes after unlocking
until the engine ignition is switched on, but
no longer than approx. 5 minutes:
An alarm has been triggered.
Tilt alarm sensor The tilt of the vehicle is monitored.
The alarm system responds in situations such as
attempts to steal a wheel or when the car is
towed.
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Interior motion sensorThe windows and glass sunroof must be closed
for the system to function properly.
Avoiding unintentional alarms
The tilt alarm sensor and interior motion sensor
can be switched off together, such as in the fol‐
lowing situations:▷In automatic car washes.▷In duplex garages.▷During transport on trains carrying vehicles,
at sea or on a trailer.▷With animals in the vehicle.
Switching off the tilt alarm sensor and
interior motion sensor
Press the remote control button again
within 10 seconds as soon as the vehi‐
cle is locked.
The indicator lamp lights up for approx. 2 sec‐
onds and then continues to flash.
The tilt alarm sensor and interior motion sensor
are turned off, until the vehicle is locked again.
Switching off the alarm
▷Unlock vehicle with the remote control or
reel on the ignition, if needed through
emergency detection of remote control, re‐
fer to page 35.▷With Comfort Access: If you are carrying the
remote control on your person, grasp the
driver side or front passenger side door
handle completely.
Unlock vehicle with the remote control or reel
on the ignition, if needed through emergency
detection of remote control, refer to page 35.
Power windows
Note Take the remote control with you
Take the remote control with you when
leaving the vehicle so that children, e.g., cannot
operate the power windows and injure them‐
selves. ◀
On 5-door models
On 3-door models
Opening
▷ Press the button to the resistance
point.
The window opens while the reel is held.▷ Press the reel beyond the resistance
point.
The window opens automatically. Pressing
again stops the motion.
See also: Convenient opening, refer to page 37,
via remote control.
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ClosingKeep the closing path clear
Monitor closing and make sure that the
closing path of the window is clear; otherwise,
injuries may result. ◀
Pull switch up.
The window closes while the reel is held.
See also: closing by means of Comfort Access, refer to page 41.
Pinch protection system If closing force exceeds a specific margin as a
window closes, closing is interrupted.
The window reopens slightly.
Danger of jamming even with pinch pro‐
tection
Even with the pinch protection system, check
that the window's closing path is clear; other‐
wise, the closing action may not stop in certain
situations, e.g., if thin objects are present. ◀
No window accessories
Do not install any accessories in the win‐
dow's range of movement; otherwise, the
pinch protection system will be impaired. ◀
Closing without the pinch protection
system
Keep the closing path clear
Monitor closing and make sure that the
closing path of the window is clear; otherwise,
injuries may result. ◀
E.g. danger from the outside or ice might pre‐
vent window from closing properly - proceed as
follows:1.Pull the reel past the resistance point and
hold it there.
The pinch protection is limited and the win‐
dow reopens slightly if the closing force ex‐
ceeds a certain margin.2.Pull the reel past the resistance point again
within approx. 4 seconds and hold it there.
The window closes without jam protection.
On 5-door models: safety reel
The safety reel in the driver's door can be used
to prevent children, e.g., from opening and
closing the rear windows using the switches in
the rear.
Switching on and off Press button.
The LED lights up if the safety function
is switched on.
Safety reel for rear operation
Press the safety reel when transporting
children in the rear; otherwise, injury may result
if the windows are closed without supervi‐
sion. ◀
Panoramic glass sun‐
roof
Hints Keep the closing path clear
Monitor closing and make sure that the
closing path of the glass sunroof is clear; other‐
wise, injuries may result. ◀
Take the remote control with you
Take the remote control with you when
leaving the vehicle so that children, e.g., cannot
operate the glass sunroof and injure them‐
selves. ◀
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For the occupants' safety the belt locking
mechanism triggers early. Slowly guide the belt
out of the holder when applying it.
If needed, disengage the belt in the rear from
the belt buckle on the side.
Although airbags enhance safety by providing
added protection, they are not a substitute for
safety belts.
The two outer safety belt buckles, integrated
into the rear seat, are for passengers sitting on
the left and right.
The center rear safety belt buckle is solely in‐
tended for the center passenger.
Hints One person per safety belt
Never allow more than one person to
wear a single safety belt. Never allow infants or
small children to ride on a passenger's lap. ◀
Putting on the belt
Lay the belt, without twisting, snugly
across the lap and shoulders, as close to the
body as possible. Make sure that the belt lies
low around the hips in the lap area and does
not press on the abdomen. Otherwise, the belt
can slip over the hips in a frontal impact and in‐
jure the abdomen.
The safety belt must not lie across the neck, rub
on sharp edges, be routed over breakable ob‐
jects, or be pinched. ◀
What reduces the restraining effect
Avoid wearing bulky clothing, and pull
the shoulder belt periodically to readjust the
tension. Make sure that the belt is not jammed;
otherwise, the belt can be damaged and the
restraining effect is reduced. ◀
Using the middle safety belt
If the middle safety belt in the rear is
used, the larger side of the backrest must be
locked. Otherwise, the safety belt will not have
a restraining effect. ◀Buckling the belt
Make sure you hear the latch plate engage in
the belt buckle.
Unbuckling the belt
1.Hold the belt firmly.2.Press the red button in the belt buckle.3.Guide the belt back into its roll-up mecha‐
nism.
Safety belt reminder for driver's seat
and front passenger seat
The indicator lamp lights up and a sig‐
nal sounds. Make sure that the safety
belts are positioned correctly. The
safety belt reminder is active at speeds above
approx. 6 mph/10 km/h. It can also be acti‐
vated if objects are placed on the front passen‐
ger seat.
Damage to safety belts
Wear and tear after accidents or when dam‐
aged otherwise:
Have the safety belts, including the safety belt
tensioners, replaced and have the belt anchors
checked.
Check and replace safety belts
This should only be done by your service
center; otherwise, this safety feature might not
work properly. ◀
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DrivingVehicle features and op‐
tions
This chapter describes all standard, country-
specific and optional features offered with the
series. It also describes features that are not
necessarily available in your car, e. g., due to
the selected options or country versions. This
also applies to safety-related functions and sys‐
tems.
Start/Stop button The concept Pressing the Start/Stop button
switches the ignition on or off
and starts the engine.
Steptronic transmission: the en‐
gine starts in selector lever posi‐
tion P or N with the brake pedal pressed when
you press the Start/Stop button.
Manual transmission: the engine starts with the
clutch pedal pressed when the Start/Stop but‐
ton is pressed.
Ignition on Steptronic transmission: press the Start/Stop
button, and do not press on the brake pedal at
the same time.
Manual transmission: press the Start/Stop but‐
ton without stepping on the clutch pedal.
All vehicle systems are ready for operation.
Most of the indicator and warning lights in the
instrument cluster light up for a varied length of
time.
To save battery power when the engine is off,
reel off the ignition and any unnecessary elec‐
tronic systems/power consumers.Note
If the engine is switched off and the ignition is
switched on, the system automatically switches
to the radio-ready state with doors open and
the lights switched off or the daytime running
lights switched on.
Ignition off
Manual transmission: press the Start/Stop but‐
ton again without stepping on the clutch pedal.
Steptronic transmission: shift to selector lever
position P, press the Start/Stop button again
without stepping on the brake.
All indicator lights in the instrument cluster go
out.
To save battery power when the engine is off,
reel off the ignition and any unnecessary elec‐
tronic systems/power consumers.
Ignition automatically cuts off while the vehicle
is stationary and the engine is stopped:▷During locking, also with the low beams ac‐
tivated.▷Shortly before the battery is discharged
completely, so that the engine can still be
started. This function is only available when
the low beams are turned off.▷When opening and closing the driver door,
if the driver's safety belt is unbuckled and
the low beams are turned off.▷While the driver's safety belt is unbuckled
with driver's door open and low beams off.▷The low beams reel to parking lights after
approx. 15 minutes of no use.
Radio ready state
Activate radio-ready state:
▷When the engine is running: press the Start/
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Some electronic systems/power consumers re‐
main ready for operation.
Radio ready state switches off automatically:▷After approx. 8 minutes.▷When the vehicle is locked using the central
locking system.▷Shortly before the battery is discharged
completely, so that the engine can still be
started.
The radio-ready state remains active if, e.g., the
ignition is automatically switched off for the fol‐
lowing reasons:
▷Opening or closing the driver's door.▷Unfastening of the driver's safety belt.▷When automatically switching from low
beams to parking lights.
Starting the engine
General information Enclosed areas
Do not let the engine run in enclosed
areas, since breathing in exhaust fumes may
lead to loss of consciousness and death. The
exhaust gases contain carbon monoxide, an
odorless and colorless but highly toxic gas. ◀
Unattended vehicle
Do not leave the vehicle unattended with
the engine running; doing so poses a risk of
danger.
Before leaving the vehicle with the engine run‐
ning, set the parking brake and place the trans‐
mission in selector lever position P or N to pre‐
vent the vehicle from moving. ◀
Repeated starting in quick succession
Avoid trying to start the vehicle repeat‐
edly and in quick succession. Otherwise, the
fuel is not burned or is inadequately burned,
posing a risk of overheating and damage to the
catalytic converter. ◀
Do not wait for the engine to warm-up while
the vehicle remains stationary. Start driving at
moderate engine speeds.
Steptronic transmission
Starting the engine1.Depress the brake pedal.2.Engage selector lever position P or N.3.Press the Start/Stop button.
The ignition is activated automatically for a cer‐
tain time and is stopped as soon as the engine
starts.
Manual transmission
Starting the engine
1.Depress the brake pedal.2.Press on the clutch pedal and shift to neu‐
tral.3.Press the Start/Stop button.
The ignition is activated automatically for a cer‐
tain time and is stopped as soon as the engine
starts.
Engine stop
General information Take the remote control with you
Take the remote control with you when
leaving the vehicle so that children, e.g., cannot
start the engine. ◀
Apply parking brake and further secure
the vehicle if needed.
Set the parking brake firmly when parking; oth‐
erwise, the vehicle could roll. On steep upward
and downward inclines, further secure the ve‐
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hicle, e.g., by turning the steering wheel in the
direction of the curb. ◀
Before driving into a car wash So that the vehicle can roll into a car wash ob‐
serve instructions for going into an automatic
car wash, refer to page 212.
Steptronic transmission
Switching off the engine1.Engage selector lever position P with the
vehicle stopped.2.Press the Start/Stop button.
The engine is switched off.
The radio-ready state is switched on.3.Set the parking brake.
Manual transmission
Switching off the engine
1.With the vehicle at a standstill, press the
Start/Stop button.
The engine is switched off.
The radio-ready state is switched on.2.Shift into first gear or reverse.3.Set the parking brake.
Auto Start/Stop function
The concept
The Auto Start/Stop function helps save fuel.
The system switches off the engine during a
stop, e.g., in traffic congestion or at traffic
lights. The ignition remains switched on. The
engine starts again automatically for driving off.
Automatic operation
After every start of the engine using the Start/
Stop button, the Auto Start/Stop function is in
the last selected state, refer to page 63. When
the Auto Start/Stop function is active, it is avail‐
able when the vehicle is traveling faster than
about 3 mph, approx. 5 km/h.
Engine stop
The engine is switched off automatically during
a stop under the following conditions:
Manual transmission:▷Neutral is engaged and the clutch pedal is
not pressed.▷The driver's safety belt is buckled or the
driver's door is closed.
Steptronic transmission:
▷The selector lever is in selector lever posi‐
tion D.▷Brake pedal remains depressed while the
vehicle is stopped.▷The driver's safety belt is buckled or the
driver's door is closed.
In order to be able to release the brake pedal,
engage lever in position P P. The engine re‐
mains off.
To continue driving depress the brake pedal.
When a gear is engaged, the engine starts au‐
tomatically.
The air flow from the air conditioner is reduced
when the engine is switched off.
Displays in the instrument cluster The display indicates that theAuto Start/Stop function is ready
for an Automatic engine start.
The display indicates that the
conditions for an automatic en‐
gine stop have not been met.
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NoteThe engine is not switched off automatically in
the following situations:▷The external temperature is high and auto‐
matic climate control is running.▷The car's interior has not yet been heated
or cooled to the required level.▷The engine is not yet at operating tempera‐
ture.▷The wheels are at a sharp angle or the
steering wheel is being turned.▷After driving in reverse.▷Fogging of the windows when the auto‐
matic climate control is switched on.▷The vehicle battery charge is very low.▷The engine compartment lid is unlocked.▷The parking assistant is activated.▷Stop-and-go traffic.▷Selector lever in selector lever position R, N
or M/S.
Starting the engine
The engine starts automatically under the fol‐
lowing conditions:
▷Manual transmission:
The clutch pedal is pressed.▷Steptronic transmission:
By releasing the brake pedal.
After the engine starts, accelerate as usual.
Safety mode
After the engine switches off automatically, it
will not start again automatically if any one of
the following conditions are met.
▷The driver's safety belt is unbuckled and
the driver's door is open.▷The hood was unlocked.
Some indicator lights light up for a varied
length of time.
The engine can only be started via the Start/
Stop button.
Note
Even if driving off was not intended, the deacti‐
vated engine starts up automatically in the fol‐
lowing situations:▷Excessive warming of the car's interior
when the cooling function is switched on.▷The steering wheel is turned.▷Steptronic transmission: change from selec‐
tor lever position D to R, N or M/S.▷Steptronic transmission: change from selec‐
tor lever position P to R, N, D or M/S.▷The vehicle begins rolling.▷Fogging of the windows when the auto‐
matic climate control is switched on.▷The vehicle battery charge is very low.▷Excessive cooling of the car's interior when
the heating is switched on.▷Manual transmission: low brake vacuum
pressure; this can occur, e.g., if the brake
pedal is depressed a number of times in
succession.
Switching the system on/off
Using the button
Press button.
▷LED comes on: Auto Start/Stop function is
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