▷Pressing the Start/Stop button.▷Releasing the parking brake.▷Opening and closing of doors or windows.▷Shifting the selector lever into neutral.▷Using vehicle equipment.
There is risk of accidents or injuries. Do not
leave children or animals unattended in the ve‐
hicle. Carry remote control along when exiting
and lock the vehicle. ◀
WARNING
An unsecured vehicle can put itself into
motion and 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 slope, turn the
front wheels in the direction of the curb.▷On uphill grades or on a slope, also secure
the vehicle, e.g. with a wheel chock. ◀
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 220.
Steptronic transmission
Switching off the engine
1.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 engine1.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 53. 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.Seite 51DrivingCONTROLS51
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▷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. The engine remains
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.
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 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.▷At higher elevations.▷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.
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 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.Seite 52CONTROLSDriving52
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▷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
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.Steptronic transmission: engage selector
lever position P.2.Press the Start/Stop button. The ignition is
switched off. The Auto Start/Stop function is
deactivated.3.Manual transmission: shift into first gear or
reverse.4.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.
MalfunctionThe 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 ApplyingThe 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
If for once use during driving is required, en‐
gage the parking brake slightly and hold the
button down.
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.
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Setting the brightnessThe brightness can be adjusted when night
lighting is active in the instrument cluster.1. Press button.2. "Settings"3."Center Instrument"4."Brightness"5.Turn the right-hand knob.
Settings are stored for the profile currently
used.
Chrono package in the
cockpit
The concept
The Chrono package consists of three display
instruments in the cockpit, where the engine oil
pressure, the turbocharger boost, and the time
are displayed. In addition, intermediate and to‐
tal times can be measured using the stop
watch.
The display elements of the Chrono package
mainly support a sporty driving style, e,g, on
racetracks.
Overview
1Engine oil pressure display2Display of turbocharger boost3Time/stop watchEngine oil pressure
The current engine oil pressure is displayed. At
low temperatures, there can be an increase in
the engine oil pressure.
Turbocharger boostThe current boost of the engine's turbocharger
is displayed.
Stop watch
General information The stop watch contains the following features:▷Measuring the total time.▷Measuring and storing of up to nine lap
times.▷Displaying the time.
The red indicator light indicates that the
stop watch is active.
Overview, buttons
▷MODE button, arrow 1.▷START/STOP button, arrow 2.▷RESET/LAP buttons, arrow 3.
Displaying the measured times
The times measured using the stop watch are
shown in minutes and seconds on the display.
For times greater than 60 minutes, the num‐ bers of hours and the minutes with seconds are
alternatively displayed.
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If the stop watch is running, the seconds are
also shown using a seconds pointer in the scale
of the display element.
Measuring the total time1.Press button, arrow 2, to start the stop
watch.2.Press button, arrow 2, again to stop the
stop watch.
Lap times
General information
It is possible to measure and store up to nine
lap times. Older lap times are overwritten.
Measuring and storing a lap time
1.Press button, arrow 2, to start the stop
watch.2.Press button, arrow 3, to measure and store
a lap time.
The lap time is briefly shown in the display
and via the seconds pointer of the stop
watch, e.g., LAP 1 with the measured time.
The stop watch continues running in the
background.3.If needed, press button, arrow 3, again to
measure a further lap time.
Calling up lap times
1.Press button, arrow 1, repeatedly until
LAP 1 is shown on the display.2.Press button, arrow 2, to call up the individ‐
ual lap times.
Deleting lap times
1.Press button, arrow 1, repeatedly until
LAP 1 is shown on the display.2.Press button, arrow 3, to delete all stored
lap times.
Displaying the time
The time is copied from the instrument cluster.
Press button, arrow 1, repeatedly until the time
is displayed.Seite 75DisplaysCONTROLS75
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Status displayThe current status of the Tire Pressure Monitor
TPM can be displayed, e.g., whether or not the
TPM is active.1. Press button.2. "Vehicle Info"3."Vehicle status"4."Tire Pressure Monitor (TPM)"
The status is displayed.
In addition, the current tire inflation pressures
are displayed. It shows the actual values read;
they may vary depending on driving style or
weather conditions.
Carry out reset
Reset the system after each adjustment of the
tire inflation pressure and after every tire or
wheel change.
1.Start the engine - do not drive off.2. Press button.3. "Vehicle Info"4."Vehicle status"5."Tire Pressure Monitor (TPM)"6.To reset the tire pressure: "Perform reset"7.Drive away.
"Resetting…" is displayed.
After driving faster than 19 mph/30 km/h for a
short period, the set tire inflation pressures are
accepted as reference values. The resetting
process is completed automatically while driv‐
ing.
You may interrupt this trip at any time. When
you continue the reset resumes automatically.
Low tire pressure message The yellow warning lamp lights up. A
Check Control message is displayed.
▷There is a flat tire or a major loss in tire in‐
flation pressure.▷A reset of the system was not carried out
after a wheel was changed. The system
therefore issues a warning based on the tire
pressures before the last reset.1.Reduce your speed and stop cautiously.
Avoid sudden braking and steering maneu‐
vers.2.Check whether the vehicle is fitted with
regular tires or run-flat tires.
Run-flat tires, refer to page 187, are la‐
beled with a circular symbol containing the
letters RSC marked on the tire's sidewall.
WARNING
A damaged regular tire with low or miss‐
ing tire inflation pressure impacts handling,
such as steering and braking response. Run-flat
tires can maintain limited stability. There is risk
of an accident. Do not continue driving if the
vehicle is not equipped with run-flat tires. Ob‐
serve the information on run-flat tires and con‐
tinued driving with these tires. ◀
A low tire inflation pressure might turn on DSC
Dynamic Stability Control.
Actions in the event of a flat tireNormal tires
1.Identify the damaged tire.
Do this by checking the air pressure in all
four tires.
The tire pressure gauge of the Mobility Sys‐
tem, refer to page 188, can be used for this
purpose.
If the tire inflation pressure in all four tires is
correct, the Tire Pressure Monitor may not
have been initialized. In this case, initialize
the system.
If identification of flat tire damage is not
possible, please contact a dealer’s serviceSeite 85SafetyCONTROLS85
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ported though tire inflation pressures are cor‐
rect.
The tire inflation pressure depends on the tire's
temperature. Driving or exposure to the sun
will increase the tire's temperature, thus in‐
creasing the tire inflation pressure. The tire in‐
flation pressure is reduced when the tire tem‐
perature falls again. These circumstances may
cause a warning when temperatures fall very
sharply.
The system cannot indicate sudden serious tire
damage caused by external circumstances.
Malfunction The yellow warning lamp flashes and
then lights up continuously. A Check
Control message is displayed. No flat
tire or loss of tire pressure can be detected.
Examples and recommendations in the follow‐
ing situations:▷A wheel without TPM electronics is
mounted, e.g. emergency wheel: Have it
checked by a dealer’s service center or an‐
other qualified service center or repair shop
as needed.▷Malfunction: Have system checked by a
dealer’s service center or another qualified
service center or repair shop.▷TPM was unable to complete the reset. Re‐
set the system again.▷Interference through systems or devices
with the same radio frequency: After leav‐
ing the area of the interference, the system
automatically becomes active again.
Declaration according to NHTSA/FMVSS
138 Tire Pressure Monitoring System
Each tire, including the spare (if provided)
should be checked monthly when cold and in‐
flated to the inflation pressure recommended
by the vehicle manufacturer on the vehicle
placard or tire inflation pressure label. (If your
vehicle has tires of a different size than the size
indicated on the vehicle placard or tire inflation
pressure label, you should determine the
proper tire inflation pressure for those tires.) As
an added safety feature, your vehicle has been
equipped with a tire pressure monitoring sys‐
tem (TPMS) that illuminates a low tire pressure
telltale when one or more of your tires is signifi‐
cantly under-inflated. Accordingly, when the
low tire pressure telltale illuminates, you should
stop and check your tires as soon as possible,
and inflate them to the proper pressure. Driving
on a significantly under-inflated tire causes the
tire to overheat and can lead to tire failure. Un‐
der-inflation also reduces fuel efficiency and
tire tread life, and may affect the vehicle's han‐
dling and stopping ability. Please note that the
TPMS is not a substitute for proper tire mainte‐
nance, and it is the driver's responsibility to
maintain correct tire pressure, even if under-in‐
flation has not reached the level to trigger illu‐
mination of the TPMS low tire pressure telltale.
Your vehicle has also been equipped with a
TPMS malfunction indicator to indicate when
the system is not operating properly. The TPMS
malfunction indicator is combined with the low
tire pressure telltale. When the system detects
a malfunction, the telltale will flash for approxi‐
mately one minute and then remain continu‐
ously illuminated. This sequence will continue
upon subsequent vehicle start-ups as long as
the malfunction exists. When the malfunction
indicator is illuminated, the system may not be
able to detect or signal low tire pressure as in‐
tended. TPMS malfunctions may occur for a va‐
riety of reasons, including the installation of re‐
placement or alternate tires or wheels on the
vehicle that prevent the TPMS from functioning
properly. Always check the TPMS malfunction
telltale after replacing one or more tires or
wheels on your vehicle to ensure that the re‐
placement or alternate tires and wheels allow
the TPMS to continue to function properly.Seite 87SafetyCONTROLS87
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FTM Flat Tire Monitor
The concept
The system does not measure the actual infla‐
tion pressure in the tires.
It detects a tire inflation pressure loss by com‐
paring the rotational speeds of the individual
wheels while moving.
In the event of a tire inflation pressure loss, the
diameter and therefore the rotational speed of
the corresponding wheel changes. This will be
detected and reported as a flat tire.
Functional requirements
The system must have been initialized when
the tire inflation pressure was correct; other‐
wise, reliable flagging of a flat tire is not as‐
sured. Initialize the system after each correc‐
tion of the tire inflation pressure and after
every tire or wheel change.
Status display The current status of the flat tire monitor can
be displayed, e.g., whether the RPA is active.1. Press button.2. "Vehicle Info"3."Vehicle status"4."Flat Tire Monitor (FTM)"
The status is displayed.
Initialization When initializing the once set inflation tire pres‐
sures serve as reference values in order to de‐
tect a flat tire. Initialization is started by con‐
firming the inflation pressures.
Do not initialize the system when driving with
snow chains.
1. Press button.2. "Vehicle Info"3."Vehicle status"4."Flat Tire Monitor (FTM)"5.Start the engine - do not drive off.6.Start the initialization with "Flat Tire
Monitor (FTM) reset".7.Drive away.
The initialization is completed while driving,
which can be interrupted at any time.
The initialization automatically continues when
driving resumes.
Indication of a flat tire The yellow warning lamp lights up. A
Check Control message is displayed.
There is a flat tire or a major loss in tire
inflation pressure.
1.Reduce your speed and stop cautiously.
Avoid sudden braking and steering maneu‐
vers.2.Check whether the vehicle is fitted with
normal tires or run-flat tires.
Run-flat tires, refer to page 187, are la‐
beled with a circular symbol containing the
letters RSC marked on the tire's sidewall.
WARNING
A damaged regular tire with low or miss‐
ing tire inflation pressure impacts handling,
such as steering and braking response. Run-flat
tires can maintain limited stability. There is risk
of an accident. Do not continue driving if the
vehicle is not equipped with run-flat tires. Ob‐
serve the information on run-flat tires and con‐
tinued driving with these tires. ◀
When a flat tire is indicated, DSC Dynamic Sta‐
bility Control is switched on if needed.
System limits A natural, even tire inflation pressure loss in all
four tires will not be recognized. Therefore,
check the tire inflation pressure regularly.
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