Driving and operating115Hill start assistThe system helps prevent unintendedmovement when driving away on
inclines.
When releasing the foot brake after
stopping on an incline, the brakes
remain on for a further two seconds.
The brakes release automatically as
soon as the vehicle begins to
accelerate.
If control indicator Z illuminates
while driving, there is a fault in the Hill
start assist 3 76 . Seek the assistance
of a workshop to have the fault
remedied.
The Hill start assist is not active
during an Autostop.
Stop-start system 3 105.Ride control systems
Traction Control system The Anti-Slip Regulator (ASR) is a
component of the Electronic Stability
Program (ESP).
ASR 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 starts 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.
ASR is operational as soon as the
control indicator R extinguishes.
When ASR is active, control indicator
R flashes.9 Warning
Do not let this special safety
feature tempt you into taking risks
when driving.
Adapt speed to the road
conditions.
Deactivation
ASR can be switched off when
spinning of drive wheels is required:
press button ASR OFF briefly.
116Driving and operating
LED in button illuminates and,
depending on version, a message
may also appear in the Driver
Information Centre 3 80.
ASR is reactivated by pressing the
ASR OFF button again.
ASR is also reactivated the next time
the ignition is switched on.
Fault ASR will switch off automatically in
the event of a fault. Control indicator
R will illuminate in the instrument
cluster. Depending on version, a
message may also appear in the
Driver Information Centre 3 80.
Have the cause of the fault remedied
by a workshop.
Control indicator R 3 76.
Electronic stability
program
Electronic Stability Program (ESP)
improves driving stability when
necessary, regardless of the type ofroad 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.
ESP is operational as soon as control
indicator R extinguishes.
When ESP comes into action, control indicator R flashes.
The ESP system is automatically
activated when the vehicle is started
and cannot be deactivated9 Warning
Do not let this special safety
feature tempt you into taking risks
when driving.
Adapt speed to the road
conditions.
Fault
In the event of a fault, ESP will be
automatically switched off and control
indicator R will illuminate in the
instrument cluster. Depending on
version, a message may also appear
in the Driver Information Centre 3 80.
The LED in the ASR OFF button will
also illuminate.
Have the cause of the fault remedied
by a workshop.
Control indicator R 3 76.
Driving and operating117Driver 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 above approx.
20 mph. Deviations from the stored
speeds may occur when driving uphill or downhill.
Do not use the cruise control if it is not
advisable to maintain a constant
speed.
Control indicator m 3 80.
Switching on
Turn end of lever to the ON position;
control indicator m illuminates in the
instrument cluster. Depending on version, a message may also appear
in the Driver Information Centre 3 80.
Activation
Accelerate to the desired speed and
push lever upwards ( +); the current
speed is stored and maintained.
Accelerator pedal can be released.
Vehicle speed can be increased by depressing the accelerator pedal.
When the accelerator pedal is
released, the previously stored speed
is resumed.
Cruise control remains activated
while gearshifting.
Increase speed With cruise control active, push lever
upwards ( +) or briefly push lever
upwards ( +) repeatedly: speed
increases continuously or in small
increments.
Alternatively accelerate to the desired speed and store by pushing leverupwards ( +).
Driving and operating119
■ The rear doors / tailgate are open.
■ An object was hanging out of the rear doors / tailgate during the last
drive cycle. Once the object has been removed, the parking assist
will return to normal operation.
■ An object or cover is attached to the
rear of the vehicle.
■ The bumper is damaged. Take the vehicle to a workshop to repair the
system.
■ Other conditions, such as vibrations from a jackhammer, are
affecting system performance.
In the event the system still does not
work properly, seek the assistance of
a workshop.
A warning chime is also sounded
briefly if a fault is present when
reverse gear is engaged 3 86.
Notice
The volume of the warning chime
can also be adjusted via the Driver
Information Centre 3 80.Important hints for using the
parking assist systems9 Warning
Under certain circumstances,
various reflective surfaces on
objects or clothing as well as
external noise sources may cause the system to fail to detect
obstacles.
Special attention has to be paid to
low obstacles which can damage
the lower part of the bumper. If
such obstacles leave the detection area of the sensors during
approach of the vehicle, a
continuous warning tone will
sound.
Caution
Performance of the sensor can be reduced when sensors are
covered, e.g. by ice or snow.
Performance of the parking assist
systems can be reduced due to
heavy loading.
Special conditions apply if there
are taller vehicles involved (e.g.
off-road vehicles, mini vans,
vans). Object identification in the upper part of these vehicles
cannot be guaranteed.
Objects with a very small reflection
cross section, like objects of
narrow size or soft materials, may
not be detected by the system.
Parking assist will not avoid a
collision with objects which are out
of the detection range of the
sensors.
Notice
The parking assist system
automatically detects factory-fitted
towing equipment. It is deactivated
when the connector is plugged in.
The sensor may detect a non-
existent object (echo disturbance)
caused by external acoustic or
mechanical disturbances.
122Driving and operatingCaution
To avoid damage, do not attempt
to operate the sliding side door
when the fuel filler flap is open.
Notice
Depending on model, the sliding
side door may be fitted with a safety system that prevents the door from
being opened fully when the fuel
filler flap is open.
Sliding side door 3 23.
The fuel filler cap can be retained in
the bracket on the fuel filler flap.
To refuel, fully insert the pump nozzle
and switch it on.
After the automatic cut-off, the fuel tank can be topped up with a
maximum of two doses of fuel.Caution
Wipe off any overflowing fuel
immediately.
To close, replace fuel filler cap and
turn clockwise.
Insert key into fuel filler cap and turn
clockwise to lock, then remove key.
Close the fuel filler flap.
Natural gas refuelling
Open the fuel filler flap.
9 Warning
Refuel only with a maximum
output pressure of 250 bar. Use
only temperature compensated
filling stations.
The refuelling procedure must be
completed, i.e. the filler neck must be
vented.
Vehicle care127
■ Open the bonnet, close all doorsand lock the vehicle.
■ Disconnect the clamp from the negative terminal of the vehicle
battery. Beware that all systems are
not functional, e.g. anti-theft locking
system.
Putting back into operation When the vehicle is to be put back into
operation:
■ Connect the clamp to the negative terminal of the vehicle battery.
Activate the electronics of the
power windows.
■ Check tyre pressure.
■ Fill up the washer fluid reservoir. ■ Check the engine oil level.
■ Check the coolant level.
■ Fit the number plates if necessary.End-of-life vehicle
recovery Information on end-of-life vehicle
recovery centres and the recycling of
end-of-life vehicles is available on our
website. Only entrust this work to an
authorised recycling centre.
Natural gas vehicles must be recycled by a service centre authorised for
natural gas vehicles.Vehicle checks
Performing work9 Warning
Only perform engine compartment
checks when the ignition is off.
The cooling fan may start
operating even if the ignition is off.
130Vehicle care
If the cooling system is cold, the
coolant level should be between the
MIN and MAX mark. Top up if the
level is low.
9 Warning
Allow the engine to cool before
opening the cap. Carefully open
the cap, relieving the pressure
slowly.
To top up use a 1:1 mixture of
released coolant concentrate mixed
with clean tap water. If no coolant
concentrate is available, use clean
tap water. Install the cap tightly. Have
the coolant concentration checked
and have the cause of the coolant
loss remedied by a workshop.
Power steering fluid
If the fluid level in the reservoir falls
below the MIN mark consult a
workshop.
If an unusual noise sounds during
steering or the power steering reacts
conspicuously, seek the assistance of a workshop.
Washer fluid
Fill with clean water mixed with a
suitable quantity of windscreen
washer fluid which contains
antifreeze.
Caution
Only washer fluid with a sufficient
antifreeze concentration provides
protection at low temperatures or
a sudden drop in temperature.
Vehicle care131BrakesA squealing noise, or illumination ofbrake pad wear control indicator F
indicates that the brake lining is at its
minimum thickness.
Continued driving is possible but
have the brake linings replaced as
soon as possible.
Once new brake linings are installed,
do not brake unnecessarily hard for
the first few journeys.
Brake pad wear indicator F 3 75.
Brake fluid9 Warning
Brake fluid is poisonous and
corrosive. Avoid contact with eyes, skin, fabrics and painted surfaces.
The brake fluid level must be betweenthe MIN and MAX marks.
When topping up, ensure maximum cleanliness as contamination of the
brake fluid can lead to brake system
malfunctions. Have the cause of the
loss of brake fluid remedied by a
workshop.
Only use high-performance brake
fluid approved for the vehicle.
Brake and clutch fluid 3 162.
Vehicle battery
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 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.