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 mode 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 67.
When the Auto Start/Stop function is active, it
is available when the vehicle is traveling faster
than about 3 mph, approx. 5 km/h.
Engine stop
The engine is switched off automatically dur‐
ing a stop under the following conditions:
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.
The air flow from the air conditioner is reduced
when the engine is switched off.
Displays in the instrument cluster The READY display in the tach‐
ometer signals that the Auto
Start/Stop function is ready to
start the engine automatically.
The display indicates that the
conditions for an automatic en‐
gine stop have not been met.
Functional limitations
The engine is not switched off automatically in
the following situations:▷External temperature too low.▷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 temper‐
ature.▷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.▷Vehicle battery is heavily discharged.▷At higher elevations.▷The engine compartment lid is unlocked.▷The parking assistant is activated.▷Neck warmer is activated.▷Stop-and-go traffic.▷The selector lever is in 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.
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.Seite 66ControlsDriving66
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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.▷Steptronic transmission: change from se‐
lector lever position D to R, N or M/S.▷Steptronic transmission: change from se‐
lector lever position P to N, D, R or M/S.▷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.
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.
Automatic deactivation
In certain situations, Auto Start/Stop function
is deactivated automatically for safety reasons
as if the driver were absent.
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.
Parking brake Applying
The lever automatically engages after being
pulled up.
The indicator lamp lights up red. The
parking brake is set.
Lower lamp: indicator lamp in Canadian
models
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Releasing
Raise lever slightly, press the button and guide
the lever down.
Hints Use while driving
On rare occasions if it is necessary to use
the parking brake while driving, do not use ex‐
cessive force when applying it. When using it,
keep the button on the lever depressed.
Otherwise, using excessive force when apply‐
ing the parking brake may cause the rear
wheels to lock, resulting in fishtailing.◀
To prevent corrosion and one-sided brake ac‐
tion, lightly apply the parking brake periodically
while coasting, if traffic conditions permit.
The brake lights will not light up if the parking
brake is set.
Turn signal, high beams,
headlight flasher
Turn signal
Hints Do not adjust the exterior mirrors
Do not adjust the exterior mirror while
driving and when turn signals/hazard warning
flashers are on, or else the additional turn sig‐
nal lights in the exterior mirror are out of posi‐
tion and can't be seen.◀
Using turn signals
Press the lever beyond the resistance point.
To switch off manually, press the lever to the
resistance point.
Unusually rapid flashing of the indicator lamp
indicates that a turn signal bulb has failed.
Triple turn signal activation Press the lever to the resistance point.
The turn signal flashes three times.
The function can be activated or deactivated.
On the Control Display:
1."Settings"2."Lighting"3."Triple turn signal"
Settings are stored for the profile currently in
use.
Signaling briefly
Press the lever to the resistance point and hold
it there for as long as you want the turn signal
to flash.
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Interval mode or rain sensor
The concept The rain sensor automatically controls the time
between wipes depending on the intensity of the rainfall. The sensor is located on the wind‐
shield, directly behind the interior rearview mir‐
ror.
Activating/deactivating
Press button on the wiper lever.
Wiping is started. If the vehicle is equipped
with a rain sensor: LED in wiper lever lights up.
When wipers are frozen to windshield, wiper
operation is deactivated.
Deactivate the rain sensor in car washes
Deactivate the rain sensor when passing
through an automatic car wash; otherwise, un‐
intentional wiping can cause damages.◀
Setting the frequency or sensitivity of
the rain sensor
Turn the thumbwheel.
Clean the windshield, headlights
Pull the wiper lever towards you.
The system sprays washer fluid on the wind‐
shield and activates the wipers briefly.
In addition, the headlights are cleaned at regu‐
lar intervals when the vehicle's lights are acti‐
vated.
Do not use the washer system at freezing
temperatures
Do not use the washers if fluid could freeze
onto the windshield which might impede your
viewing field. Therefore use antifreeze fluid.
Avoid using the washer when the reservoir is
empty; operation might damage pump.◀
Windshield washer nozzles The windshield washer nozzles are automati‐
cally heated while the ignition is switched on.
Fold-out position of the wipers Fold wipers back when you want to change the
blades or with pending low temperatures.
1.Switch the ignition on and off again.2.With icy conditions make sure that blades
are not frozen to the windshield.3.Press the wiper lever up beyond the point
of resistance and hold it for approx. 3 sec‐
onds, until the wiper remains in a nearly
vertical position.
After the wipers are folded back down, the
wiper system must be reactivated.
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To start with Launch Control do not steer the
steering wheel.
Start with launch controlWhile 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.
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, allow the trans‐
mission to cool down for approx. 5 minutes.
Launch Control adjusts to the surrounding
conditions, e.g., wet pavement, when used
again.
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▷Messages, e.g. Check Control, refer to
page 77.▷Current fuel consumption, refer to
page 82.▷Navigation display, see User's manual for
Navigation, Entertainment and Communi‐
cation.▷Range, refer to page 81.▷Status, Driving Dynamics Control, refer to
page 121.▷Service requirements, refer to page 82.▷Speed limit detection, refer to page 83.▷Time, refer to page 81.
Check Control
The concept The Check Control system monitors functions
in the vehicle and notifies you of malfunctions
in the monitored systems.
A Check Control message is displayed as a
combination of indicator or warning lights and
text messages in the instrument cluster and in
the Head-up Display.
In addition, an acoustic signal may sound and a text message may appear on the Control Dis‐
play.
Indicator/warning lights
General information
The indicator and warning lights in the instru‐
ment cluster can light up in a variety of combi‐
nations and colors.
Several of the lights are checked for proper
functioning and light up temporarily when the
engine is started or the ignition is switched on.
Red lights
Safety belt reminder Flashing or illuminated: safety belt on
the driver or passenger side is not
buckled. The safety belt reminder can
also be activated if objects are placed on the
front passenger seat.
Make sure that the safety belts are positioned
correctly.
Airbag system Airbag system and belt tensioner are
defective.
Have the vehicle checked by the serv‐
ice center immediately.
Parking brake, brake system For additional information, refer to Re‐
lease parking brake, refer to page 68.
Front-end collision warning Illuminated: advance warning is issued,
e.g., when there is the impending dan‐
ger of a collision or the distance to the
vehicle ahead is too small.
Increase distance.
Flashing: acute warning of the imminent dan‐
ger of a collision when the vehicle approaches
another vehicle at a relatively high differential
speed.
Intervention by braking or make an evasive ma‐
neuver.
Pedestrian warning Symbol in the instrument cluster.Seite 77DisplaysControls77
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If a collision with a person detected in this way
is imminent, the symbol lights up and a signal
sounds.
Orange lights Active Cruise Control The number bars shows the selected
distance from the vehicle driving
ahead.
For additional information, refer to Active
Cruise Control with Stop & Go function, ACC,
refer to page 124.
Vehicle detection, Active Cruise Control Illuminated: vehicle driving ahead de‐
tected.
Flashing: the conditions are not ade‐
quate for operating the system.
The system was deactivated but applies the
brakes until you actively resume control by
pressing on the brake pedal or accelerator
pedal.
Yellow lights
Anti-lock Braking System ABS Avoid abrupt braking if possible. Brak‐
ing force boost in some cases defec‐
tive. Stop carefully. Take into account
longer brake travel. Have this checked
by the service center immediately.
DSC Dynamic Stability Control Flashing: DSC controls the drive and
braking forces. The vehicle is stabi‐
lized. Reduce speed and adapt driving
profile to the driving circumstances.
Illuminated: DSC failed. Have the system
checked by the service center.For additional information, refer to Dynamic
Stability Control DSC, refer to page 119.
DSC Dynamic Stability Control is
deactivated or DTC Dynamic Traction
Control is activated
Dynamic Stability Control DSC is
switched off or Dynamic Traction Con‐
trol DTC is switched on.
For additional information, refer to Dynamic
Stability Control, refer to page 119, and Dy‐
namic Traction Control, refer to page 120.
Flat Tire Monitor FTM The Flat Tire Monitor signals a loss of
tire inflation pressure in a tire.
Reduce your speed and stop cau‐
tiously. Avoid sudden braking and steering ma‐
neuvers.
For more information, see Flat Tire Monitor, re‐
fer to page 104.
Tire Pressure Monitor TPM Illuminated: the Tire Pressure Monitor
signals a loss of tire inflation pressure
in a tire.
Reduce your speed and stop cautiously. Avoid
sudden braking and steering maneuvers.
Flashing and then continuously illuminated: no
flat tire or loss of tire inflation pressure can be
detected.▷Interference through systems or devices
with the same radio frequency: after leav‐
ing the area of the interference, the system
automatically becomes active again.▷TPM could not conclude the reset: perform
the reset of the system again.▷A wheel without TPM electronics is fitted:
have the service center check it if needed.▷Malfunction: have the system checked by
your service center.Seite 78ControlsDisplays78
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For more information, see Tire Pressure Moni‐
tor, refer to page 100.
Steering system Steering system in some cases defec‐
tive.
Have the steering system checked by
the service center.
Engine functions Have the vehicle checked by the serv‐ice center.
For additional information, refer to On-
board Diagnostics socket, refer to page 206.
Lane departure warning System is switched on and under cer‐
tain circumstances warns if a detected
lane is left without flashing beforehand.
For additional information, refer to Lane depar‐
ture warning, refer to page 114.
Green lights Turn signal Turn signal on.
Unusually rapid flashing of the indicator
lamp indicates that a turn signal bulb
has failed.
For additional information, refer to Turn signal,
refer to page 68.
Parking lights, headlight control Parking lights or headlights are acti‐
vated.
For additional information, refer to
Parking lights/low beams, headlight control, re‐
fer to page 91.Front fog lights
Front fog lights are activated.
For additional information, refer to
Front fog lights, refer to page 94.
High-beam Assistant High-beam Assistant is switched on.
High beams are activated and off auto‐
matically as a function of the traffic sit‐
uation.
For additional information, refer to High-beam
Assistant, refer to page 93.
Cruise control The system is switched on. It maintains
the speed that was set using the con‐
trol elements on the steering wheel.
Blue lights
High beams High beams are activated.
For additional information, refer to High
beams, refer to page 69.
General lamps
Check Control At least one Check Control message is
displayed or is stored. The symbol is
shown in the display of the instrument
cluster.
Text messagesText messages in combination with a symbol
in the instrument cluster explain a Check Con‐ trol message and the meaning of the indicator
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