
▷Vehicle battery is heavily discharged.▷At higher elevations.▷The engine compartment lid is unlocked.▷HDC Hill Descent Control is activated.▷The parking assistant is activated.▷Stop-and-go traffic.▷Selector lever in selector lever position N,
M/S or R.▷Use of fuel with high ethanol content.
Starting the engine
The engine starts automatically under the fol‐
lowing conditions:
▷Steptronic transmission: by releasing the
brake pedal.
When Automatic Hold is activated: press
the accelerator 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.
Functional limitations
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.▷Fogging of the windows when the auto‐
matic climate control is switched on.▷Vehicle battery is heavily discharged.▷Excessive cooling of the car's interior when
the heating is switched on.
Activating/deactivating the system
manually
Using the button
Press button.
▷LED comes on: Auto Start/Stop function is
deactivated.
The engine is started during an automatic
engine stop.
The engine can only be stopped or started
via the Start/Stop button.▷LED goes out: Auto Start/Stop function is
activated.
Switching off the vehicle during an
automatic engine stop
During an automatic engine stop, the vehicle
can be switched off permanently, e.g., when
leaving it.
Steptronic transmission:
1.Press the Start/Stop button. The ignition is
switched off. The Auto Start/Stop function
is deactivated.
Selector lever position P is engaged auto‐
matically.2.Set the parking brake.
Engine start as usual via Start/Stop button.
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Automatic deactivation
In certain situations, the Auto Start/Stop func‐
tion is deactivated automatically for safety rea‐
sons, as it is detected that no driver is present.
Malfunction
The Auto Start/Stop function no longer
switches off the engine automatically. A Check Control message is displayed. It is possible to
continue driving. Have the system checked by
a dealer’s service center or another qualified
service center or repair shop.
Parking brake
The concept The parking brake is used to prevent the vehi‐
cle from rolling when it is parked.
Information WARNING
An unsecured vehicle can begin to move
and possibly roll away. There is risk of an acci‐
dent. Before exiting, secure the vehicle against
rolling.
In order to ensure that the vehicle is secured
against rolling away, observe the following:▷Set the parking brake.▷On uphill grades or on a downhill slope,
turn the front wheels in the direction of the
curb.▷On uphill grades or on a downhill slope,
also secure the vehicle, e.g., with a wheel
chock.◀
WARNING
Unattended children or animals can
cause the vehicle to move and endanger them‐
selves and traffic, e.g., due to the following ac‐
tions:
▷Pressing the Start/Stop button.▷Releasing the parking brake.▷Opening and closing the doors or win‐
dows.▷Engaging selector lever position N.▷Using vehicle equipment.
There is risk of accidents or injuries. Do not
leave children or animals unattended in the ve‐
hicle. Take the remote control with you when
exiting and lock the vehicle.◀
Overview
Parking brake
Setting Pull the switch.
The LED lights up.
The indicator lamp lights up red. The
parking brake is set.
While driving
Use as emergency brake while driving:
Pull the switch and hold it. The vehicle brakes
hard while the switch is being pulled.
The indicator lamp lights up red, a sig‐
nal sounds and the brake lights light
up.
A Check Control message is displayed.
If the vehicle is slowed down to a speed of ap‐
prox. 2 mph/3 km/h the parking brake is set.
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DeactivatingPress button again.
The LED and the letters AUTO H go
out.
Automatic Hold is deactivated.
If the vehicle is being held by Automatic Hold,
press on the brake pedal to deactivate it.
When the parking brake is set manually, Auto‐
matic Hold is deactivated automatically.
Driving Automatic Hold is activated: the vehicle is au‐
tomatically secured against rolling after brak‐
ing to a standstill.
The indicator lamp lights up green.
Step on the accelerator pedal to drive
off.
The brake is released automatically.
The indicator lamp goes out.
ATTENTION
If the vehicle is stationary, Automatic
Hold engages the parking brake. It prevents
the vehicle from rolling in a vehicle wash.
There is a risk of damage to property. Deacti‐
vate Automatic Hold prior to entering the vehi‐
cle wash.◀
Parking The parking brake is automatically set if the
engine is switched off while the vehicle is be‐
ing held by Automatic Hold.
The indicator lamp changes from green
to red.
The parking brake is not set if the en‐
gine is switched off while the vehicle is coast‐
ing to a halt. Automatic Hold is deactivated.
Automatic Hold remains activated during the
engine stop brought about by the Auto Start/
Stop function.WARNING
Unattended children or animals can
cause the vehicle to move and endanger them‐
selves and traffic, e.g., due to the following ac‐
tions:▷Pressing the Start/Stop button.▷Releasing the parking brake.▷Opening and closing the doors or win‐
dows.▷Engaging selector lever position N.▷Using vehicle equipment.
There is risk of accidents or injuries. Do not
leave children or animals unattended in the ve‐
hicle. Take the remote control with you when
exiting and lock the vehicle.◀
Malfunction
In the event of a failure or malfunction of the
parking brake, secure the vehicle against roll‐
ing using a wheel chock, e.g., when leaving it.
After a power failure
Putting the parking brake into
operation
1.Switch on the ignition.2. Press the switch while stepping on
the brake pedal or selector lever position P
is set.
It may take several seconds for the brake to be
put into operation. Any sounds associated with
this are normal.
The indicator lamp in the instrument
cluster goes out as soon as the parking
brake is ready for operation.
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downshifting is not possible if the engine
speed is too high.
The selected gear is briefly displayed in the in‐
strument cluster, followed by the currently se‐
lected gear.
Steptronic Sport transmission: avoid automatic upshifting in M/S manual
mode
The Steptronic Sport transmission does not
automatically upshift in M/S manual mode
once the maximum speed is reached, if one of
the following conditions is met:▷DSC deactivated.▷TRACTION activated.▷SPORT+ activated.
In addition, there is no downshifting for kick‐
down.
Ending the sport program/manual
mode
Push the selector lever to the right.
D is displayed in the instrument cluster.
Shift paddles
The shift paddles on the steering wheel allow
you to shift gears quickly while keeping both
hands on the steering wheel.
▷Shift up: briefly pull right shift paddle.▷Shift down: briefly pull left shift paddle.
Gears will only be shifted at appropriate engine
and road speeds, for example downshifting is
not possible if the engine speed is too high.
The selected gear is briefly displayed in the in‐
strument cluster, followed by the current gear.
If the shift paddles on the steering wheel are
used to shift gears in automatic mode, the
transmission switches to manual mode tempo‐
rarily in selector lever position D and perma‐
nently in selector lever position S.
In selector lever position D, after conservative
driving for a certain amount of time in manual
mode or if there has been no acceleration or
shifting of the shift paddles within a certain
amount of time, the transmission switches
back to automatic mode.
Displays in the instrument cluster The selector lever position is dis‐played, for example: P.
Electronic unlocking of the
transmission lock
General information
Electronically unlock the transmission lock to
maneuver vehicle from the danger area.
Unlocking is possible, if the starter can spin the
engine.
Before unlocking the transmission lock, apply
the parking brake to prevent the vehicle from
rolling away.
Engaging selector lever position N1.Press and hold down brake pedal.2.Press the Start/Stop button. The starter
must audibly start.3.Press the unlock button on the selector
lever, see arrow 1, and press and hold the
selector lever into selector lever position N,
see arrow N.Seite 79DrivingControls79
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A corresponding Check Control message
is displayed.4.Release the selector lever and press it
again into selector lever position N within
approx. 6 seconds.
Selector lever position N is displayed in the
instrument cluster.5.Release brake, as soon as the starter
stops.6.Maneuver the vehicle from the danger area
and secure it against moving on its own.
For further information, see the Tow-starting
and towing chapter.
Steptronic Sport transmission:
Launch Control
The concept Launch Control enables optimum acceleration
on surfaces with good traction.
General information
The use of Launch Control causes premature
component wear since this function represents
a very heavy load for the vehicle.
Do not use Launch Control during the break-in,
refer to page 184, period.
To increase vehicle stability, activate DSC
again as soon as possible.
An experienced driver may be able to achieve
better acceleration values in DSC OFF mode.
Requirements
Launch Control is available when the engine is
warmed up, that is, after uninterrupted driving
of at least 6 miles/10 km.
To start with Launch Control do not steer the
steering wheel.
Start with launch control While the engine is running:1. Press button or select Sport+ with
the Driving Dynamics Control.
TRACTION is displayed in the instrument
cluster and the indicator lamp for DSC OFF
lights up.2.Engage selector lever position S.3.With the left foot, forcefully press down on
the brake.4.Press and hold down the accelerator pedal
beyond the resistance point at the full
throttle position, kickdown.
A flag symbol is displayed in the instru‐
ment cluster.5.The starting engine speed adjusts. Within
3 seconds, release the brake.
Before using Launch Control again, allow the
transmission to cool down for approx. 5 mi‐
nutes.
Launch Control adjusts to the surrounding
conditions, for example, wet pavement, when
used again.
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If there is only enough fuel left for less than
45 miles/80 km, the color of the display
changes.
Average fuel consumption
The average fuel consumption is calculated for
the period while the engine is running.
The average fuel consumption is calculated for
the distance traveled since the last reset by the
onboard computer.
Average speed
Periods in which the vehicle is parked with the
engine manually stopped are not included in
the calculation of the average speed.
Resetting average values
Press and hold button on turn signal lever.
Distance to destination
The distance remaining to the destination is
displayed if a destination is entered in the navi‐
gation system before the trip is started.
The distance to the destination is adopted au‐
tomatically.
Time of arrival The estimated time of arrival is
displayed if a destination is en‐
tered in the navigation system
before the trip is started.
The time must be correctly set.
Speed limit detection
Further information, see chapter Speed limit
detection.
Trip onboard computer
The vehicle features two types of onboard
computers.▷"Onboard info": the values can be reset as
often as necessary.▷"Trip computer": the values provide an
overview of the current trip.
Resetting the trip onboard computer
On the Control Display:
1."Vehicle info"2."Trip computer"3."Reset": all values are reset.
"Automatically reset": all values are reset
approx. 4 hours after the vehicle came to a
standstill.
Display on the Control Display
Display the onboard computer or trip onboard
computer on the Control Display.
1."Vehicle info"2."Onboard info" or "Trip computer"
Resetting the fuel consumption or
speed
On the Control Display:
1."Vehicle info"2."Onboard info"3."Consumpt." or "Speed"4."Yes"Seite 95DisplaysControls95
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maneuvers or driving over obstacles, for exam‐
ple, curbs, potholes, etc.
Because the possible driving distance de‐
pends on how the vehicle is used during the
trip, the actual distance may be shorter or lon‐
ger depending on the driving speed, road con‐
ditions, external temperature, cargo load, etc.
WARNING
Your vehicle handles differently when a
run-flat tire is damaged and has low or missing
tire inflation pressure, e.g., your lane stability is
reduced when braking, braking distances are
longer and the self-steering properties will
change. There is risk of an accident.
Drive moderately and do not exceed a speed of
50 mph/80 km/h.◀
Final tire failure
Vibrations or loud noises while driving can indi‐
cate the final failure of a tire.
Reduce speed and stop; otherwise, pieces of
the tire could come loose and cause an acci‐
dent.
Do not continue driving. Contact a dealer’s
service center or another qualified service cen‐
ter or repair shop.
Intelligent Safety The concept
Intelligent Safety enables central operation of
the driver assistance system.
Depending on how the vehicle is equipped, In‐
telligent Safety consists of one or more sys‐
tems that can help prevent a imminent colli‐
sion. These systems are active automatically
every time the engine is started using the
Start/Stop button:▷Front-end collision warning, refer to
page 115.▷Pedestrian warning, refer to page 120.Information
WARNING
Indicators and warnings do not relieve
the driver from personal responsibility. Due to
system limits, warnings or reactions of the sys‐
tem may not be output or they may be output
too late or incorrectly. There is risk of an acci‐
dent. Adjust the driving style to the traffic con‐
ditions. Watch traffic closely and actively inter‐
vene in the respective situations.◀
WARNING
Due to system limits, individual functions
can malfunction during tow-starting/towing
with the Intelligent Safety systems activated,
e.g., approach control warning with light brak‐
ing function. There is risk of an accident.
Switch all Intelligent Safety systems off prior to
tow-starting/towing.◀
Overview
Button in the vehicle
Intelligent Safety button
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▷If, depending on the vehicle equipment
version, the field of view of the camera in
the mirror or the radar sensor is dirty or ob‐
scured.▷Up to 10 seconds after the start of the en‐
gine, via the Start/Stop button.▷During calibration of the camera immedi‐
ately after vehicle delivery.▷If there are constant blinding effects be‐
cause of oncoming light, e. g., from the sun
low in the sky.
Warning sensitivity
The more sensitive the warning settings are,
for example the warning time, the more warn‐
ings are displayed. However, there may also be
an excess of false warnings.
Front-end collision warning
with City Braking function
The concept
The system can help prevent accidents. If an
accident cannot be prevented, the system will
help reduce the collision speed.
The system sounds a warning before an immi‐
nent collision and actuates brakes independ‐
ently if needed.
The automatic braking intervention is done
with limited force and duration.
A camera in the area of the interior mirror con‐
trols the system.
The front-end collision warning is available
even if cruise control has been deactivated.
With the vehicle approaching another vehicle
intentionally, the collision warning and braking
are delayed in order to avoid false system re‐
actions.
General information
The system warns at two levels of an imminent
danger of collision at speeds from approx.
3 mph/5 km/h. Time of warnings may vary with
the current driving situation.
Appropriate braking kicks in at speeds of up to
35 mph/60 km/h.
Detection range
It responds to objects if they are detected by
the system.
Information WARNING
Indicators and warnings do not relieve
the driver from personal responsibility. Due to
system limits, warnings or reactions of the sys‐
tem may not be output or they may be output
too late or incorrectly. There is risk of an acci‐
dent. Adjust the driving style to the traffic con‐
ditions. Watch traffic closely and actively inter‐
vene in the respective situations.◀
WARNING
Due to system limits, individual functions
can malfunction during tow-starting/towing
with the Intelligent Safety systems activated,
e.g., approach control warning with light brak‐
ing function. There is risk of an accident.
Switch all Intelligent Safety systems off prior to
tow-starting/towing.◀
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