The battery compartment is accessible.3.Slide the key in the cover of the battery
compartment and raise the cover.4.Insert a battery of the same type with the
positive side facing up.5.Insert lid and cover.
Have old batteries disposed of by a
dealer’s service center or another quali‐
fied service center or repair shop or
take them to a collection point.
New remote controls
New remote controls are available from a
dealer’s service center or another qualified
service center or repair shop.
Loss of the remote controls The lost remote control can be blocked by a
dealer’s service center or another qualified
service center or repair shop.
Emergency detection of remote control
It is possible to switch on the ignition or start
the engine in situations such as the following:
▷Interference of radio transmission to re‐
mote control by external sources e.g., by
radio masts.▷Empty battery in remote control.▷Interference from radio transmissions
through mobile devices in close proximity
to remote control.▷Interference of radio transmission by
charger while charging items such as mo‐
bile devices in the vehicle.
A Check Control message is displayed if an at‐
tempt is made to switch on the ignition or start
the engine.
Starting the engine via emergencydetection of the remote control
Steptronic transmission: if a corresponding
Check Control message appears, hold the re‐
mote control, as shown, against the marked
area on the steering column and press the
Start/Stop button within 10 seconds while
pressing the brake.
Manual transmission: if a corresponding Check
Control message appears, hold the remote con‐
trol, as shown, against the marked area on the
steering column and press the Start/Stop but‐
ton within 10 seconds while pressing the
clutch.
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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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Electronic displays1Driver assistance systems
Messages, e.g. Check Control
Time 67
External temperature 67
Selection lists 70
Total miles/trip odometer 67On-board computer 712Selector lever position display 58
Gear shift indicator 683Driving Dynamics Control 99
StatusCheck 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 com‐
bination of indicator or warning lights and text
messages in the instrument cluster.
In addition, an acoustic signal may be output
and a text message may appear on the radio.Indicator/warning lights
General information
The indicator and warning lights can light up in
a variety of combinations 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 buck‐
led. The safety belt reminder can alsoSeite 63DisplaysCONTROLS63
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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 DSC, refer to page 97, and
Dynamic Traction Control DTC, refer to
page 98.
Flat Tire Monitor FTM The Flat Tire Monitor signals a loss of
tire inflation pressure in a tire.
Reduce your speed and stop cautiously.
Avoid sudden braking and steering maneuvers.
For additional information, refer to Flat Tire
Monitor, refer to page 88.
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
mounted: Have it checked by a dealer’s
service center or another 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.For additional information, refer to Tire Pres‐
sure Monitor, refer to page 84.
Steering system Steering system in some cases not
working.
Have steering system checked immedi‐
ately by a dealer’s service center or another
qualified service center or repair shop.
Engine functions Have vehicle checked immediately by a
dealer’s service center or another quali‐
fied service center or repair shop.
For additional information, refer to On-board
Diagnostics socket, refer to page 201.
Green lights
Turn signal Turn signal switched 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 54.
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 76.
Front fog lights Front fog lights are activated.
For additional information, refer to
Front fog lights, refer to page 79.Seite 65DisplaysCONTROLS65
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Fuel gaugeVehicle tilt position may cause
the display to vary.
The arrow beside the fuel pump
symbol shows which side of the
vehicle the fuel filler flap is on.
Hints on refueling, refer to page 174.
Tachometer
Always avoid engine speeds in the red warning
field. In this range, the fuel supply is interrupted
to protect the engine.
Odometer and trip odom‐
eter
The concept
Odometer and trip odometer are displayed in
the instrument cluster.
Resetting the trip odometer Press the knob.▷The odometer is displayed
when the ignition is switched
off.▷When the ignition is switched
on, the trip odometer is re‐
set.
External temperature
If the indicator drops to
+37 ℉/+3 ℃, a signal sounds.
A Check Control message is dis‐
played.
There is an increased risk of ice
on roads.
WARNING
Even at temperatures above +37 ℉/+3 ℃
there can be a danger of icy roads, e.g. on
bridges or shady sections of road. There is risk
of an accident. Adjust your driving style to the
weather conditions at low temperatures. ◀
Time The time is displayed in the in‐
strument cluster.
Setting the time on the radio, re‐
fer to page 73.
Date The date is displayed in the in‐
strument cluster.
Set the date on the radio, refer
to page 73.
Range
Display With a low remaining range:▷A Check Control message is
displayed briefly.▷The remaining range is
shown on the onboard com‐
puter.▷With a dynamic driving style, e.g. taking
curves aggressively, the engine function is
not always ensured.
The Check Control message appears continu‐
ously below a range of approx. 30 miles/50 km.
CAUTION
With a range of less than 30 miles/50 km
it is possible that the engine will no longer have
sufficient fuel. Engine functions are no longer
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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 PC button on blinker lever.
Engine temperature display Displays the current engine temperature, based
on a combination of coolant and motor oil tem‐
perature. As soon as the optimum operating
temperature has been attained, the indicator is
in the center position.
If the engine oil or coolant, thus the engine, be‐
come too hot, a Check Control message is dis‐
played.
Check the coolant level, refer to page 198.
Speed limit detection Description of the speed limit detection, refer
to page 69, function.
Speed warning The concept
Displays speed limit which, when reached, should cause a warning to be issued.
The warning is repeated if the vehicle speed
drops below the set speed limit once by at least
3 mph/5 km/h.
Displaying, setting or changing the
limit1. Press button.2. "Settings"3."Speed"4."Warning at:"5.Turn the right knob until the desired limit is
displayed.6.Press the right button.
The speed limit is stored.
Activating/deactivating the limit
1. Press button.2. "Settings"3."Speed"4."Warning"
Setting your current speed as the limit
1. Press button.2. "Settings"3."Speed"4."Select current speed"
The current vehicle speed is stored as the
limit.
Settings on the radio
The following settings are created on the radio:
▷Time, date.▷Formats, units of measure.
Formats and units of measure
1. Press button.2. "Settings"3."Language/Units"Seite 72CONTROLSDisplays72
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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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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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