Instruments and controls107
FlashesElectric parking brake is in servicemode. Stop vehicle, apply and
release the electric parking brake to
reset.9 Warning
Have the cause of the fault
remedied immediately by a
workshop.
Antilock brake system
(ABS) u illuminates yellow.
Illuminates for a few seconds after the ignition is switched on. The system is
ready for operation when the control
indicator extinguishes.
If the control indicator does not go out after a few seconds, or if it illuminates while driving, there is a fault in the
ABS. The brake system remains
operational but without ABS
regulation.
Antilock brake system 3 169.
Upshift
[ is shown as a symbol in the Driver
Information Centre, when upshifting
is recommended for fuel saving
reasons.
On some versions gear shift
indication is popped up as full page in the Driver Information Centre 3 111.
Gear shifting R or S with the number of the next
higher or lower gear is indicated,
when up- or down-shifting is
recommended.
Variable effort steering c illuminates yellow.
Fault in variable effort steering
system. This may lead to a higher or
lower steering effort. Consult a
workshop.Following distance
E indicates the following distance
setting of adaptive cruise control or the alert timing sensitivity of forwardcollision alert by filled distance bars.
Adaptive cruise control 3 180.
Forward collision alert 3 187.
Lane departure warning ) illuminates green or flashes yellow.
Illuminates green
The system is switched on and ready
to operate.
Flashes yellow
The system recognizes an
unintended lane change.
Ultrasonic parking assist
r illuminates yellow.
Fault in system
or
Fault due to sensors that are dirty or
covered by ice or snow
116Instruments and controls
Economy index
The current fuel consumption is
indicated on an economic scale. For
economical driving adapt your driving style to keep the indicator within the
Eco area. Indicator outside the Eco
area means higher fuel consumption.
On Baselevel display, the current consumption value is indicated.
Shift indication : On Baselevel display
the current gear is indicated inside an
arrow. The figure above recommends upshifting for fuel saving reasons.
Blank page
Shows a blank page without any
information.
Performance Menu Performance menu is only viewable
on Uplevel display.
The following list contains all possible Performance Menu pages. Some
may not be available for your
particular vehicle.
Press Q or P to select a page:
■ performance page
■ g-force indication■ friction bubble
■ acceleration and braking
■ lap timer
Depending on settings of the Uplevel
display, "Oil temperature", "Oil
pressure" or "Battery voltage" can be
also indicated left or right from the
speedometer.
Performace page
Indicates oil temperature in degrees
Celsius.
Indicates the oil pressure in kPa.
Indicates the current absolute amount of the turbo boost being added.
G-force indication
Indicates the force of vehicle
performance. The amount of positive/
negative longitudinal force and lateral force will be displayed. The g-force
value unit will be calculated and
displayed as a numerical value.Friction bubble
A four quadrant visual display,
indicative of the four corners of the
car, with a "bubble" showing where
the most inertia is being exerted on
the vehicle.
Acceleration and braking
Displays the percentage amount of
brake or accelerator pressure applied by the driver as a bar graph around
the outer perimeter of the DIC area.
The left side is for acceleration and
the right side is for braking.
Lap timer
The lap timer function measures the
time that has passed since the last
time the user started or stopped the lap timer through ignition cycles.
Timer values are displayed from
hours to tenths of a second. Start and
stop the timer by pressing 9 button.
Current and Previous lap times are displayed accurate to the tenth of a second. Gain or loss time is indicated
in ss.s format.
Driving and operating169Caution
It is not advisable to drive with thehand resting on the selector lever.
Gear shift indication 3 107.
Drive systems
All-wheel drive
The All-wheel drive system enhances
driving characteristics and stability,
and helps to achieve the best
possible driveability regardless of
ground surface. The system is always active and cannot be deactivated.
The torque is distributed steplessly
between the wheels of the front and rear axle, depending on the driving
conditions. Additionally the torque
between the rear wheels is distributed
depending on the surface.
For optimum system performance,
the vehicle's tyres should not have
varying degrees of wear.
If a service message is displayed in
the Driver Information Centre, the
system may have limited functionality
(or be completely disabled in some
cases, i.e. the vehicle switches to
Front-wheel drive). Seek the
assistance of a workshop.
Towing the vehicle 3 264.Brakes
The brake system comprises two independent brake circuits.
If a brake circuit fails, the vehicle can
still be braked using the other brake
circuit. However, braking effect is
achieved only when the brake pedal
is depressed firmly. Considerably
more force is needed for this. The
braking distance is extended. Seek the assistance of a workshop before
continuing your journey.
When the engine is not running, the
support of the brake servo unit
disappears once the brake pedal has
been depressed once or twice.
Braking effect is not reduced, but
braking requires significantly greater
force. It is especially important to bear this in mind when being towed.
Control indicator R 3 106.
Antilock brake system Antilock brake system (ABS)
prevents the wheels from locking.
170Driving and operating
ABS starts to regulate brake pressureas soon as a wheel shows a tendency to lock. The vehicle remains
steerable, even during hard braking.
ABS control is made apparent
through a pulse in the brake pedal
and the noise of the regulation
process.
For optimum braking, keep the brake
pedal fully depressed throughout the
braking process, despite the fact that
the pedal is pulsating. Do not reduce
the pressure on the pedal.
After starting off, the system performs
a self-test which may be audible.
Control indicator u 3 107.
Adaptive brake light During full braking, all three brakelights flash for the duration of ABS
control.
Fault9 Warning
If there is a fault in the ABS, the
wheels may be liable to lock due
to braking that is heavier than
normal. The advantages of ABS are no longer available. During
hard braking, the vehicle can no longer be steered and may
swerve.
Have the cause of the fault remedied
by a workshop.
Parking brake
Manual parking brake9 Warning
Always apply parking brake firmly
without operating the release
button, and apply as firmly as
possible on a downhill or uphill
slope.
To release the parking brake, pull
the lever up slightly, press the
release button and fully lower the
lever.
Driving and operating175
■ Antilock Brake System (ABS) withcornering brake control (CBC)
■ Automatic transmission
SPORT mode
The settings of the systems are
adapted to a sportier driving style:
■ Damping of shock absorbers reacts
more stiffly to provide better contact with the road surface.
■ The engine reacts more quickly to the accelerator pedal.
■ Steering support is reduced.
■ Engine torque of All-wheel drive is distributed more to the rear axle.
■ Shift points of automatictransmission occur later.
■ Depending on the instrument cluster the colouring of the display
will be adapted.
TOUR mode
The settings of the systems are
adapted to a comfort driving style:
■ Damping of shock absorbers reacts
more softly.
■ Accelerator pedal reacts with standard settings.
■ Steering support is in standard mode.
■ Engine torque of All-wheel drive isdistributed mainly to the front axle.
■ Shift points of automatic transmission occur in a comfort
mode.
NORMAL mode
All settings of the systems are
adapted to standard values.
Drive mode control
Within each manually selected driving mode SPORT, TOUR or NORMAL,
the Drive Mode Control (DMC)
detects and analyses continuously
the real driving characteristic,
responses by the driver, and the
active dynamic state of the vehicle. If
necessary, the control unit of DMC
automatically changes the settings
within the selected driving mode or,
when recognising greater variations,
the driving mode is changed for the
length of variation.
If, for example, NORMAL mode is
selected and DMC detects a sporty
driving behaviour, DMC changes
several settings of the Normal mode
176Driving and operating
into sporty settings. The DMC
changes to SPORT mode in case of
very sporty driving behaviour.
If, for another example, TOUR mode
is selected and whilst driving on a
winding road a sudden hard brake is
necessary, DMC will detect the
dynamic vehicle condition and
changes the settings for suspension
to SPORT mode to increase vehicle
stability.
When the driving characteristic or the
dynamic vehicle state returns to the
former state, DMC will change the
settings to the preselected driving
mode.
Personalised settings in SPORT
mode
The driver can select the functions of
the SPORT mode when SPORT is
pressed.
Select the relevant settings in
Settings , I Sport Mode in the Colour-
Info-Display.
Colour-Info-Display 3 118.
Vehicle personalisation 3 122.Flex Ride - VXR Version
The VXR Version of Flex Ride system
works in the same way as the
standard Flex Ride system with the
difference that the modes have a
more sporty characteristic.VXR Flex Ride driving system allows
the driver to select between three
driving modes:
■ VXR mode: press VXR, LED
illuminates.
■ SPORT mode: press SPORT, LED
illuminates.
■ NORMAL mode: neither SPORT
nor VXR is pressed, no LED
illuminates.
Deactivate SPORT mode and VXR
mode by pressing corresponding
button once more.
In each driving mode VXR Flex Ride
networks the following electronic
systems:
■ Continuous Damping Control
■ Accelerator Pedal Control
■ Steering Control
■ All-wheel drive
■ Electronic Stability Control (ESC)
■ Antilock Brake System (ABS) with cornering brake control (CBC)
■ Automatic transmission
Vehicle care229
The vehicle battery is maintenance-
free provided that the driving profile
allows sufficient charging of the
battery. Short-distance-driving and
frequent engine starts can discharge
the battery. Avoid the use of
unnecessary electrical consumers.
Batteries do not belong in household
waste. They must be disposed of at
an appropriate recycling collection
point.
Laying up the vehicle for more than
4 weeks can lead to vehicle battery
discharge. Disconnect the clamp from the negative terminal of the vehicle
battery.
Ensure the ignition is switched off
before connecting or disconnecting
the vehicle battery.
The anti-theft alarm siren must be
deactivated as follows: Switch the
ignition on then off, disconnect the
vehicle's battery within 15 seconds.
Battery discharge protection 3 136.
Replacing the vehicle battery Notice
Any deviation from the instructions
given in this paragraph may lead to
a temporary deactivation of the stop-
start system.
The vehicle battery is covered.
Remove the cover to replace the battery. Lift up the cover at the rear
and unlatch it at the front.
When the battery is being replaced, please ensure that there are no open ventilation holes in the vicinity of the
positive terminal. If a ventilation hole
is open in this area, it must be closed
off with a dummy cap, and the
ventilation in the vicinity of the
negative terminal must be opened.
Only use vehicle batteries that allow the fuse box to be mounted above the
battery.
In vehicles with stop-start system, be
sure to have the AGM (Absorptive
Glass Mat) battery replaced with an
AGM battery again.
244Vehicle care
No.Circuit1Transmission control module2Engine control module3–4–5Ignition/Transmission control
module/Engine control module6Windscreen wiper7–8Fuel injection/Ignition system9Fuel injection/Ignition system10Engine control module11Lambda probe12Starter13Sensor throttle heating14Lighting15Rear window wiperNo.Circuit16Vacuum pump/Mass air flow
meter/Water in fuel sensor/DC
transformer17–18Adaptive forward lighting19Adaptive forward lighting20Fuel pump21Rear power windows22ABS23Variable effort steering24Front power windows25Power outlets26ABS27Electric parking brake28Heated rear window29Left power seat30Right power seatNo.Circuit31Air conditioning system32Body control module33Heated front seats34Sunroof35Infotainment system36–37Right high beam38Left high beam39–40–41Vacuum pump42Radiator fan43Vehicle battery/DC transformer
(only on vehicles with stop-start
system)44Headlamp washer system45Radiator fan