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Driving and operating247Ride control systems
Traction Control system The traction control system is a
component part of the Electronic
Stability Control (ESC) which
improves driving stability when
necessary, regardless of the type of
road surface or tyre grip, by
preventing the drive wheels from
spinning.
As soon as the drive wheels start to
spin, engine output is reduced and
the wheel spinning the most is braked
individually. This considerably
improves the driving stability of the
vehicle on slippery road surfaces.
Traction control system is operational
as soon as the ignition is switched on and control indicator b extinguishes
in the instrument cluster.
When traction control system is active b flashes.9 Warning
Do not let this special safety
feature tempt you into taking risks
when driving.
Adapt speed to the road
conditions.
Control indicator b 3 101.
Trailer stability assist 3 266.
Enhanced traction function
If necessary, in the event of soft
ground, mud or snow-covered road
surfaces, the traction control system
can be deactivated to enhance
traction:
Press Ø.
A message appears in the Driver
Information Centre.
When vehicle speed reaches
50 km/h, the system switches
automatically to standard traction control system operation. A message
appears in the Driver Information
Centre.
Traction control system is reactivated by pressing Ø again.
A message appears in the Driver
Information Centre.
Fault
If the system detects a fault, control
indicator b 3 101 illuminates together
with j 3 99 in the instrument cluster
and a corresponding message
appears in the Driver Information
Centre.
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248Driving and operatingThe traction control system is not
operational. Have the cause of the
fault remedied by a workshop.
Vehicle messages 3 106.
Driver Information Centre 3 105.
Electronic Stability Control
The Electronic Stability Control (ESC) improves driving stability when
necessary, regardless of the type of
road surface or tyre grip. It also
prevents the drive wheels from
spinning.
As soon as the vehicle starts to
swerve (understeer / oversteer),
engine output is reduced and the wheels are braked individually. This
considerably improves the driving
stability of the vehicle on slippery road
surfaces.
ESC is operational as soon as the
ignition is switched on and control indicator b extinguishes in the
instrument cluster.
When ESC comes into action b
flashes.9 Warning
Do not let this special safety
feature tempt you into taking risks
when driving.
Adapt speed to the road
conditions.
Control indicator b 3 101.
Trailer stability assist 3 266.
Enhanced traction function
If necessary, in the event of soft
ground, mud or snow-covered road
surfaces, ESC can be deactivated to
enhance traction:
Press Ø.
A message appears in the Driver
Information Centre.
When vehicle speed reaches
50 km/h, the system switches
automatically to standard ESC
operation. A message appears in the
Driver Information Centre.
ESC is reactivated by pressing Ø
again.
ESC is also reactivated the next time
the ignition is switched on.
Engine drag torque control The engine drag torque control
system is an integral feature of ESC. When downshifting under slippery
road conditions, the engine speed
and torque increases to help prevent
locking of the drive wheels during
sudden deceleration.
Side wind assist The side wind assist is an integralfeature of ESC and maintaines the
vehicle's path. When the system
comes into action " appears in the
Driver Information Centre.
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Driving and operating249Fault
If the system detects a fault, control indicator b 3 101 illuminates together
with j 3 99 in the instrument cluster
and a corresponding message
appears in the Driver Information
Centre 3 105.
The ESC is not operational. Have the cause of the fault remedied by a
workshop.
Vehicle messages 3 106.
Driver Information Centre 3 105.
Limited-slip rear axle
Rear-wheel drive vehicles may be
equipped with an automatic locking
rear differential which automatically
controls the torque transmitted to
each rear wheel, enhancing traction
in the event of soft ground, mud or
snow-covered road surfaces.9 Warning
Do not let this special safety
feature tempt you into taking risks
when driving.
Adapt speed to the road
conditions.
When vehicle speed reaches
30 km/h, or once the rear wheels
return to surfaces with normal grip,
e.g. paved roads, the system
automatically deactivates,
sometimes accompanied by a noise
(with no consequence to vehicle
behaviour).
The system can also be deactivated
manually once normal grip conditions have resumed by briefly releasing the
accelerator.
Driver assistance
systems9 Warning
Driver assistance systems are
developed to support the driver
and not to replace the driver's
attention.
The driver accepts full
responsibility when driving the
vehicle.
When using driver assistance
systems, always take care
regarding the current traffic
situation.
Cruise control
The cruise control can store and
maintain speeds of 30 km/h and
above. Deviations from the stored
speeds may occur when driving uphill or downhill. The stored speed will
flash in the Driver Information Centre
3 105.
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250Driving and operatingFor safety reasons the cruise control
cannot be activated until the brake
pedal has been operated once.
Do not use the cruise control if it is not advisable to maintain a constant
speed.
With manual transmission
automated, only activate cruise
control in automatic mode.
Control indicators m and U 3 103.
Switching on the system
Press m, control indicator U
illuminates green in the instrument
cluster.
Cruise control is now in standby mode
and a corresponding message
appears in the Driver Information
Centre.
Accelerate to the desired speed and
press < or ]. The current speed is
now stored and maintained and the
accelerator pedal can be released.
Control indicator m illuminates green
in the instrument cluster together with
U and a corresponding message
appears in the Driver Information
Centre.
Vehicle speed can be increased by
depressing the accelerator pedal.
The stored speed flashes in the
instrument cluster. When the
accelerator pedal is released, the
previously stored speed is resumed.
Cruise control remains activated
while gearshifting.
The speed is saved until the ignition
is switched off.
Page 253 of 353

Driving and operating251Increase speedWith cruise control active, the vehicle
speed can be increased continuously or in small increments by holding
down or tapping < repeatedly.
When the switch is released the
current speed is stored and
maintained.
Alternatively, accelerate to the
desired speed and store by pressing
< .
Reduce speed With cruise control active, the vehicle
speed can be decreased
continuously or in small increments
by holding down or tapping ]
repeatedly.
When the switch is released the
current speed is stored and
maintained.Deactivation of the functionality
Press $: cruise control is deactivated
and the green control indicator m
extinguishes in the instrument cluster.
Automatic deactivation: ● vehicle speed drops below 30 km/h
● the brake pedal is depressed
● the clutch pedal is depressed
● selector lever in N
The speed is stored and a
corresponding message appears in
the Driver Information Centre.
Activation of the functionality
Press R at a speed above 30 km/h.
If the stored speed is much higher
than the current speed, the vehicle
will accelerate powerfully until the
stored speed is obtained.
Pressing < will also reactivate the
cruise control function, but at the
current vehicle speed only, not the stored speed.
Switching off the system
Press m, green control indicators U
and m extinguish in the instrument
cluster.
Speed limiter
The speed limiter prevents the
vehicle exceeding a preset maximum
speed above 30 km/h.
Page 254 of 353

252Driving and operatingSwitching on the system
Press U, control indicator U
illuminates yellow in the instrument
cluster.
Speed limiter function is now in
standby mode and a corresponding
message appears in the Driver
Information Centre.
Accelerate to the desired speed and
press < or ]. The current speed is
recorded.
The vehicle can be driven normally
but it will not be possible to exceed the programmed speed limit except in an
emergency.
Where the limit speed cannot be
maintained, e.g. when driving on a
steep decline, the limit speed will
flash in the Driver Information Centre.
Increase limit speed
The limit speed can be increased
continuously or in small increments
by holding down or tapping <
repeatedly.
Reduce limit speed
The limit speed can be decreased continuously or in small increments
by holding down or tapping ]
repeatedly.
Exceeding the limit speed
In the event of an emergency it is
possible to exceed the limit speed by
depressing the accelerator pedal
firmly beyond the point of resistance.
The limit speed will flash in the Driver
Information Centre during this period.
Release the accelerator pedal andthe speed limiter function is
reactivated once a speed lower than
the limit speed is obtained.
Speed warning 3 104.
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Driving and operating253Deactivation of the functionality
Press $: speed limiter is deactivated
and the vehicle can be driven
normally.
The limit speed is stored and a
corresponding message appears in
the Driver Information Centre.
Activation of the functionality Press R. The speed limiter function is
reactivated.
Pressing < will also reactivate the
speed limiter function, but at the
current vehicle speed only, not the
stored speed.
Switching off the system
Press U.
Yellow control indicator U
extinguishes in the instrument cluster.
Active emergency braking Active emergency braking can help toreduce the damage and injury from
crashes with vehicles directly ahead,
when a collision can no longer be
avoided either by manual braking or
by steering. The feature uses various
inputs (e.g. camera sensor, radar
sensor, brake pressure, vehicle
speed) to calculate the probability of
a frontal collision.9 Warning
This system is not intended to
replace the driver responsibility for driving the vehicle and looking
ahead. Its function is limited to
supplemental use only to reduce
the vehicle speed before a
collision.
The system only detects vehicles
driving in the same direction of
traffic.
After a sudden lane change, the
system needs a certain time to
detect the next preceding vehicle.
The driver must always be ready
to take action and apply the brakes and steer to avoid collisions.
Operation conditions
The system is operational at a vehicle
speed between 15 km/h and
100 km/h.
Activation The system is automatically activewhen the ignition is switched on.
Functionality
When driving in the speed range
mentioned above and a risk of
collision with the vehicle ahead is
imminent, l will flash and a warning
chime sounds.
Page 256 of 353

254Driving and operatingThe indicator light l and the chimes
stop when the system detects that a
collision is not imminent anymore.
Just before the imminent collision, the
system brakes automatically to
reduce the impact speed of the
collision or prohibit a crash.9 Warning
Do not rely on the system to brake
the vehicle. Active emergency
braking will not brake outside of its
operating speed range and only
responds to detected vehicles.
Deactivation and re-activation
Active emergency braking can be
deactivated with the vehicle
stationary and the ignition switched
on:
Toggle through the Driver Information
Centre with the buttons on the right
lever until message Active braking
appears.
To deactivate the system, press and
hold one of the two buttons for
approx. 3 seconds. l illuminates in
the instrument cluster until system is
re-activated again.
To re-activate the system, press and hold one of the two buttons for
approx. 3 seconds. l disappears.
We recommend to deactivate the
system in the vehicle personalisation
in the following cases:
● when the vehicle is being towed
● before using an automatic car wash with ignition switched on
● if the windscreen has been damaged close to the camera
● if the front bumper has been damaged
Conditions for re-activation
The Active emergency brake system
can only be re-activated if:
● the gear lever is not in neutral
● parking brake is not activated
● vehicle is not cornering
System limitations In some cases, the active emergency
braking system may provide an
automatic braking in situations that
seem to be unnecessary, for instance in parking garages, due to traffic signs
in a curve or due to vehicles in
another lane. This is normal
operation, the vehicle does not need
service. Firmly apply the accelerator