Page 250 of 353

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.
Page 252 of 353

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 255 of 353

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
Page 260 of 353

258Driving and operatingDeactivation
To deactivate the system, press .
with the ignition on. The LED in the
button illuminates when deactivated.
To reactivate the system, press .
again. The LED in the button
extinguishes.
Functionality
When the system detects a vehicle in the side blind zone while driving
forwards, an LED will illuminate in the
relevant exterior mirror.
The LED comes on immediately when being passed.
The LED comes on after a delay when
passing another vehicle slowly.
The LED flashes when the turn lights
are activated and a vehicle is
detected.
Operation conditions
The following conditions must be
fulfilled for proper operation:
● all vehicles are moving in the same direction and in adjacent
lanes
● the speed of your vehicle is between 30 km/h and 140 km/h
● the traffic flow is normal
● driving on a straight or slightly curved road
● the vehicle is not pulling a trailer
● the sensors are not covered by mud, ice or snow
● the warning zones in the exterior mirrors or the detection zones in
front and rear bumper are not
covered
No alert will be given in the following
situations:
● in the presence of non-moving objects, e.g. parked vehicles,
barriers, street lamps, road signs
● with vehicles moving in the opposite direction
Page 266 of 353

264Driving and operating9Danger
Fuel is flammable and explosive.
No smoking. No naked flames or
sparks.
If you can smell fuel in your
vehicle, have the cause of this
remedied immediately by a
workshop.
A label with symbols at the fuel filler
flap is indicating the allowed fuel
types. In Europe the pump nozzles of the filling stations are marked with
these symbols. Refuel only the
allowed fuel type.
Caution
In case of misfuelling, do not
switch on ignition.
The fuel tank filler neck with bayonet
cap is located on the left front side of
the vehicle.
The fuel filler flap can only be opened
if the vehicle is unlocked and the door is opened. Open the fuel filler flap by
hand.
9 Danger
Vehicles with stop-start system:
The engine must be switched off
and the ignition key removed, to
avoid risk of engine being
restarted automatically by the
system.
Capacities 3 317.
Depending on vehicle, unlock fuel
filler cap using the key.
To open, turn the cap slowly
anticlockwise.
The fuel filler cap can be hung on the lower hook of the fuel filler flap.
Place the nozzle in straight position to
the filler neck and press with slight
force to insert.
After the automatic cut-off, the tank
can be topped up by operating the
pump nozzle a maximum of two more times.Caution
Wipe off any overflowing fuel
immediately.
To close, turn the fuel filler cap
clockwise.
Close the fuel filler flap.
Fuel filler cap Only use genuine fuel filler caps.Diesel-engined vehicles have special
fuel filler caps.
Page 272 of 353
270Vehicle careEnd-of-life vehicle recoveryInformation on end-of-life vehicle
recovery centres and the recycling of
end-of-life vehicles is available on our website, where legally required. Only
entrust this work to an authorised
recycling centre.Vehicle checks
Performing work9 Warning
Only perform engine compartment
checks when the ignition is off.
The vehicle must not be in an
Autostop 3 228.
The cooling fan may start
operating even if the ignition is off.
9 Danger
The ignition system generates
extremely high voltages. Do not
touch.
The caps for topping up the engine oil, the coolant, the washer fluid and the
oil dipstick handle are yellow for ease
of identification.
Bonnet
Opening
Pull the release lever and return it to
its original position.
Page 277 of 353

Vehicle care275Batteries do not belong in household
waste. They must be disposed of at
an appropriate recycling collection
point.
Laying up the vehicle for more than
four weeks can lead to battery
discharge. Disconnect the clamp from
the negative terminal of the vehicle
battery.9 Danger
Ensure the ignition is switched off
completely (the vehicle must not
be in an Autostop) before
connecting or disconnecting the
vehicle battery.
Stop-start system 3 228.
Battery discharge protection 3 117.
Battery access
The battery is located behind a panel
in the front left-hand door step.
Remove the panel to access the
battery.
Replacing the vehicle battery Ensure that the battery is always
replaced by the same type of battery.
Seek the assistance of a workshop to
have the vehicle battery replaced.
Stop-start system 3 228.
Charging the vehicle battery9 Warning
On vehicles with stop-start
system, ensure that the charging potential does not exceed 14.6 V
when using a battery charger.
Otherwise the vehicle battery may be damaged.
9 Danger
Ensure adequate ventilation when
charging the battery. There is a
risk of explosion if gases
generated during charging are
allowed to accumulate!
Jump starting 3 304.