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 66.
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.▷The brake pedal remains pressed while the
vehicle is stationary or the vehicle is held
by Automatic Hold.▷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 display indicates that the
Auto 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.
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.▷HDC Hill Descent Control is activated.▷The parking assistant 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.
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.Seite 65DrivingControls65
Online Edition for Part no. 01 40 2 954 494 - II/15
▷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.▷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 The concept
The parking brake is used to prevent the vehi‐
cle from rolling when it is parked.
Seite 66ControlsDriving66
Online Edition for Part no. 01 40 2 954 494 - II/15
Overview
Parking brake
Setting 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‐
hicle, e.g., by turning the steering wheel in the
direction of the curb.◀
Take the remote control with youTake the remote control with you when
leaving the vehicle so that children, e.g., can‐
not release the parking brake.◀
Pull the reel.
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 reel and hold it. The vehicle brakes
hard while the reel 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 down to a speed
of approx. 2 mph/3 km/h the parking brake is
set.
Releasing
With the ignition switched on:
Steptronic transmission: Press the
switch while the brake is pressed or se‐
lector lever position P is set.
The LED and indicator lamp go out.
The parking brake is released.
Automatic release in cars with
Steptronic transmission
Inadvertent operation of the accelerator
pedal
Make sure that the accelerator pedal is not op‐
erated unintentionally; otherwise, the vehicle is set in motion and there is a risk of an acci‐
dent.◀
For automatic release, step on the accelerator
pedal.
The LED and indicator lamp go out.
The parking brake is automatically released
when you step on the accelerator:▷Engine on.▷Drive mode engaged.▷Driver buckled in and doors closed.
Automatic Hold
The concept This system assists the driver by automatically
setting and releasing the brake, such as when
moving in stop-and-go traffic.
The vehicle is automatically held in place when
it is stationary.
On inclines, the system prevents the vehicle
from rolling backward when driving off.
Seite 67DrivingControls67
Online Edition for Part no. 01 40 2 954 494 - II/15
Overview
Automatic Hold
Safety information Secure the vehicle against rolling
Before leaving the vehicle with the en‐
gine running, engage position P of the Step‐
tronic transmission and ensure that the park‐
ing brake is set. Otherwise, the vehicle may
begin to move.◀
Under the following conditions, Automatic
Hold is automatically deactivated and the park‐
ing brake is set:
▷The engine is switched off.▷A door is opened and driver's safety belt is
unbuckled while the vehicle is stationary.▷The moving vehicle is brought to a stand‐
still using the parking brake.
The indicator lamp switches from
green to red and the letters AUTO H go out.
Activating
This function can be activated when the driv‐
er's door is closed, the safety belt is fastened
and the engine is running.
Press button.
The LED and the letters AUTO H light
up.
The indicator lamp lights up.
Automatic Hold is activated.
Deactivating Press 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.
Before driving into a car wash
Before driving into the car wash, deacti‐
vate Automatic Hold; otherwise, the parking
brake will be set when the vehicle is stationary
and the vehicle will no longer be able to roll.◀
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.Seite 68ControlsDriving68
Online Edition for Part no. 01 40 2 954 494 - II/15
Automatic Hold remains activated during the
engine stop brought about by the Auto Start/
Stop function.
Take the remote control with you
Take the remote control with you when
leaving the vehicle so that children, e.g., can‐
not release the parking brake.◀
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
operation1.Switch on the ignition.2. Press the reel 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.
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.
Seite 69DrivingControls69
Online Edition for Part no. 01 40 2 954 494 - II/15
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.
During trip interruption with the rain sensor
switched on: if the trip is resumed within ap‐
prox. 15 minutes, the rain sensor is automati‐
cally activated again.
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.
Seite 71DrivingControls71
Online Edition for Part no. 01 40 2 954 494 - II/15
If the shift paddles on the steering wheel are
used to shift gears in automatic mode, the
transmission temporarily switches to manual
mode.
In the manual mode, after conservative driving
for a certain amount of time 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, e.g.: 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 started can spin
the engine.
Engaging selector lever position N1.Depress the brake pedal.2.Press the Start/Stop button. The starter
must audibly start.3.Press and hold the selector lever into posi‐
tion N.
A corresponding Check Control message
is displayed.4.Press the selector lever again into posi‐
tion N within approx. 6 seconds.
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.Steptronic Sport transmission:
Launch Control
The concept Launch Control enables optimum accelerationon surfaces with good traction.
Hints Component wear
Do not use Launch Control too often;
otherwise, this may result in premature wear of
components due to the high stress placed on
the vehicle.◀
Do not use Launch Control during the break-in,
refer to page 174, 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 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.Seite 75DrivingControls75
Online Edition for Part no. 01 40 2 954 494 - II/15
▷Messages, e.g. Check Control, refer to
page 81.▷Current fuel consumption, refer to
page 86.▷Navigation display, see User's manual for
Navigation, Entertainment and Communi‐
cation.▷Range, refer to page 86.▷Status, Driving Dynamics Control, refer to
page 132.▷Service requirements, refer to page 87.▷Speed limit detection, refer to page 88.▷Time, refer to page 86.
Multifunctional instrument display
The concept
The instrument display is a variable display. In
the event of a program change, the display
rendition adapts to the respective program
through the Driving Dynamics Control. The
change of appearance can be deactivated on
the Control Display.Some of the displays in the instrument display
may differ from the way they are shown in this
Owner's Manual.
At a glance
1Fuel gauge 852Indicator/warning lights 813Speedometer4Variable displays5Tachometer 85
Selection lists 89
ECO PRO displays 1806Engine oil temperature 85Seite 78ControlsDisplays78
Online Edition for Part no. 01 40 2 954 494 - II/15