Locking
The settings are saved in the active profile. Per‐
sonal Profile, refer to page 24.1. Press button.2. "Settings"3."Doors/Key"4.Select desired setting.▷"Lock if no door is opened"
The vehicle locks automatically after a
short period of time if no door is
opened.▷"Lock after starting to drive"
The vehicle locks automatically after
you drive off.
Confirmation signals from the vehicle
1. Press button.2. "Settings"3."Doors/Key"4.Select desired setting.▷"Flash for lock/unlock"
Unlocking is signaled by two flashes,
locking by one.▷"Acoustic warning"
Unlocking is signaled by one honk of
the horn.
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.
Switch off the alarm, refer to page 31.
Tailgate in case of 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 findyourself in a dangerous situation.
Press button on the remote control for
at least 3 seconds.
To switch off the alarm: press any button.
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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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a washer antifreeze, according to the manufac‐
turer's recommendations.
Mix the washer fluid before adding to find the
right mixture.
Do not add windshield washer concentrate and
antifreeze undiluted and do not fill with pure
water; this could damage the wiper system.
Do not mix window washer concentrates of dif‐
ferent manufacturers because they can clog the
windshield washer nozzles.
Recommended minimum fill quantity: 0.2 US
gal/1 liter.
Manual transmission Shifting CAUTION
When shifting to a lower gear, excessive
speeds can damage the engine. There is risk of
property damage. When shifting into 5th or 6th
gear, press the gearshift lever to the right. ◀
Reverse gear Select only when the vehicle is stationary.
To overcome the resistance push the selector
lever dynamically to the left and engage the re‐
verse gear.
Steptronic transmission Selector lever positions
D Drive
Selector lever position for normal vehicle oper‐
ation. All gears for forward travel are activated
automatically.
R is Reverse
Select only when the vehicle is stationary.N Neutral: The vehicle may roll. Use in automatic car
washes, e.g.
P Park Select only when the vehicle is stationary. The
drive wheels are blocked.
Before exiting the vehicle, make sure that se‐
lector lever position P is set. Otherwise, the ve‐
hicle may begin to move.
Kickdown
Kickdown is used to achieve maximum driving
performance. Step on the accelerator pedal be‐
yond the resistance point at the full throttle po‐
sition.
Engaging selector lever positions To prevent the vehicle from creeping after you
select a gear, maintain pressure on the brake
pedal until you are ready to start.
The selector lever can only be taken out of se‐
lector lever position P if the ignition is on or the
engine is running.
With the vehicle is stationary, press on the
brake pedal before shifting out of selector lever
position P or N; otherwise, the selector lever is
blocked: shift lock.
A block prevents the inadvertent switching to
selector lever position P or R or the inadvertent
change from selector lever position P.Seite 58CONTROLSDriving58
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Interior lights
General information The interior lights, footwell lights, access lights
and courtesy lights are controlled automati‐ cally.
Thumb wheel for the instrument lighting con‐
trols brightness of some of these features.
Overview1Interior lights2Reading lamp3Ambient light
Switching the interior lights on and off Press button.
To switch off permanently: press the button for
approx. 3 seconds.
Switch back on: press button.
Reading lights Press button.
Reading lights are located in the front next to
the interior light.
Ambient light
Depending on your optional features lighting
can be adjusted for some lights in the interior.
Activating/deactivating
Set via radio.1. Press button.2. "Settings"3."Lighting"4."Ambient lighting"
Settings are stored for the profile currently
used.
Changing color Push the switch forward or back:
manual color change.
Push and hold the switch forward or
back: automatic color change. Push
the switch again to end color changes.
Setting the brightnessVia the thumb wheel you may adjust the
brightness of the ambient light for the instru‐
ment lighting or radio.
Set via radio.
1. Press button.2. "Settings"3."Lighting"4."Brightness"5.Set the desired brightness.Seite 80CONTROLSLights80
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The lamp indicates whether the airbags are ei‐
ther activated or deactivated.▷The indicator lamp lights up
when a child is properly
seated in a child restraint fix‐
ing system or when the seat
is empty. The airbags on the
front passenger side are not
activated.▷The indicator lamp does not light up when,
e.g., a correctly seated person of sufficient
size is detected on the seat. The airbags on
the front passenger side are activated.
Detected child seats
The system generally detects children seated in
a child seat, particularly in child seats required
by NHTSA when the vehicle was manufactured.
After installing a child seat, make sure that the
indicator lamp for the front-seat passenger air‐
bags lights up. This indicates that the child seat
has been detected and the front-seat passen‐
ger airbags are not activated.
Strength of the driver's and front-seat
passenger airbag
The explosive power that activates driver's/
front passenger's airbags very much depends
on the positions of the driver's/front passeng‐
er's seat.
To maintain the accuracy of this function over
the long-term, calibrate the front seats as soon
as a relevant Check Control message is dis‐
played.
Calibrating the front seats WARNING
There is risk of jamming when moving the
seats. There is risk of injuries or risk of property
damage. Make sure that the area of movement
of the seat is clear prior to any adjustment. ◀
An appropriate Check Control message is dis‐
played.1.Move the respective seat all the way for‐
ward.2.Move the respective seat forward again. It
moves forward briefly.3.Readjust the seat to the desired position.
The calibration procedure is completed when
the Check Control message disappears.
If the message continues to be displayed, re‐
peat the calibration.
If the message does not disappear after a re‐
peat calibration, have the system checked as
soon as possible.
Tire Pressure Monitor
TPM
The concept
The system monitors tire inflation pressure in the four mounted tires. The system warns you if
there is a significant loss of pressure in one or
more tires. For this purpose, sensors in the tire
valves measure the tire inflation pressure.
Information With use of the system observe further infor‐
mation found under Tire inflation pressure, re‐
fer to page 178.
Functional requirements The system must have been reset with the cor‐
rect tire inflation pressure; otherwise, reliable
signaling of tire pressure loss is not assured.
Reset the system after each adjustment of the
tire inflation pressure and after every tire or
wheel change.
Always use wheels with TPM electronics to en‐
sure that the system will operate properly.
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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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center or another qualified service center or
repair shop.2.Fix the flat tire using the Mobility System,
refer to page 188.
Use of tire sealant, e.g., the Mobility System,
may damage the TPM wheel electronics. In this
case, have the electronics checked at the next
opportunity and have them replaced if needed.
Run-flat tires Maximum speed
You may continue driving with a damaged tire
at speeds up to 50 mph/80 km/h.
Continued driving with a flat tire
If continuing to drive with a damaged tire:
1.Avoid sudden braking and steering maneu‐
vers.2.Do not exceed a speed of 50 mph/80 km/h.3.Check the air pressure in all four tires at the
next opportunity.
If the tire inflation pressure in all four tires is
shown to be correct, it is possible that the
Tire Pressure Monitor did not perform a re‐
set. Then perform the reset.
Possible driving distance with complete loss of
tire inflation pressure:
The possible driving distance after a loss of tire
inflation pressure depends on cargo load, driv‐
ing style and road conditions.
A vehicle with an average load has a possible
driving range of approx. 50 miles/80 km.
A vehicle with a damaged tire reacts differently,
e.g., it has reduced lane stability during brak‐
ing, a longer braking distance and different
self-steering properties. Adjust your driving
style accordingly. Avoid abrupt steering ma‐
neuvers or driving over obstacles, e.g., curbs,
potholes, etc.
Because the possible driving distance depends
on how the vehicle is used during the trip, the
actual distance may be shorter or longer de‐
pending on the driving speed, road conditions,
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.
Required inflation pressure check
message
A Check Control message is displayed in the fol‐
lowing situations▷The system has detected a wheel change,
but no reset was done.▷Inflation was not carried out according to
specifications.▷The tire inflation pressure has fallen below
the level of the last confirmation.
In this case:
▷Check the tire pressure and correct as
needed.▷Carry out a reset of the system after a tire
change.
System limits
The system does not function properly if a reset
has not been carried out, e.g., a flat tire is re‐
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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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