Page 109 of 183

Driving and operating107
■ the driver's seat belt is unfastenedand the driver's door is opened
■ three minutes have elapsed since the engine was switched off
In this event, control indicator ^
flashes in the Driver Information
Centre in conjunction with a warning
chime. Depending on version, a
corresponding message may also
appear in the Driver Information
Centre 3 80.
Fault If control indicator Æ illuminates in the
instrument cluster, there is a fault in
the stop-start system 3 79.
Depending on version, 9 will
illuminate as an alternative if control
indicator Æ is not present. A warning
message may also be displayed in
the Driver Information Centre 3 80.
Generic warning 9 3 73.
Seek the assistance of a workshop.Parking9 Warning
■ Do not park the vehicle on an
easily ignitable surface. The
high temperature of the exhaust system could ignite the surface.
■ Always apply parking brake without pressing release button.Apply as firmly as possible on a
downhill slope or uphill slope.
Depress foot brake at the same
time to reduce operating force.
■ Switch off the engine. Turn the ignition key to position STOP
and remove it. Turn the steering
wheel until the steering wheel
lock is felt to engage.
■ If the vehicle is on a level surface or uphill slope, engage
first gear before switching off the ignition. On an uphill slope, turn
the front wheels away from the
kerb.
If the vehicle is on a downhill
slope, engage reverse gear
before switching off the ignition. Turn the front wheels towards
the kerb.
Lock the vehicle 3 21 and activate the
anti-theft locking system 3 26 .
Notice
In the event of an accident with
airbag deployment, the engine is
turned off automatically if the vehicle
comes to a standstill within a certain time.
Page 115 of 183

Driving and operating113
KickdownIf the accelerator pedal is pressedpast the pressure point, the
transmission shifts to a lower gear depending on engine speed. Full
engine power is available for
acceleration.
If engine speed is too high the
transmission switches to a higher
gear, even in manual mode. Without
kickdown this automatic shift is not
effected in manual mode.
Fault
In the event of a fault, control indicator s is shown in the transmission
display.
Continued driving is possible,
provided the vehicle is driven with
care and anticipation. A warning
message may appear in the Driver
Information Centre in conjunction with
a warning chime 3 86.
Notice
The volume of the warning chime
can also be adjusted via the Driver
Information Centre 3 80.Have the cause of the fault remedied
by a workshop.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 75.
Antilock brake system
Antilock brake system (ABS)
prevents the wheels from locking.
Page 116 of 183

114Driving 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 75.
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 nolonger be steered and may
swerve.
Have the cause of the fault remedied
by a workshop.
Parking brake Manual parking brake
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.
To reduce the operating forces of the
parking brake, depress the foot brake
at the same time.
A warning chime will sound if a certain speed is exceeded with the parking
brake applied.
Notice
The volume of the warning chime can also be adjusted via the Driver
Information Centre 3 80.
Control indicator R 3 75.
Brake assist
If the brake pedal is depressed
quickly and forcefully, maximum
brake force is automatically applied
(full braking).
Maintain steady pressure on the
brake pedal for as long as full braking is required. Maximum brake force is
automatically reduced when the
brake pedal is released.
Page 123 of 183

Driving and operating121
Fuel selector
Pressing button Y in the centre
console switches between petrol and
natural gas operation. The LED 1
status shows the current operating
mode.
1 off=natural gas
operation.1 illuminates=petrol operation.
As soon as the natural gas tanks are
empty, petrol operation is
automatically engaged. Control
indicator Y illuminates in the Driver
Information Centre 3 80 until the
ignition is switched off.
A slight loss of power and torque can be expected in petrol operation. You
must therefore adapt your driving style (e.g. during overtaking
manoeuvres) and vehicle loads (e.g.
towing loads) accordingly.
Every six months run the petrol tank
down until control indicator §
illuminates and then refuel. This is
necessary to maintain fuel quality as
well as system function necessary for
petrol operation.
Fill the tank completely at regular intervals to prevent corrosion in the
tank.
Refuelling
Fuel filler flap is located at left rear side of vehicle.9 Danger
Before refuelling, switch off engine
and any external heaters with
combustion chambers. Switch off
any mobile phones.
Follow the operating and safety
instructions of the filling station
when refuelling.9 Danger
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.
Caution
In case of misfuelling, do not
switch on ignition.
Release the fuel filler flap by pulling
the flap by hand.
Insert key into fuel filler cap and turn
anticlockwise to unlock.
To remove fuel filler cap, rotate
anticlockwise.
Page 124 of 183

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.
Page 129 of 183

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.
Page 136 of 183
134Vehicle careHalogen headlights
Headlights have separate systems forlow beam/sidelight 1 (outer bulb),
high beam/daytime running light 2
(inner bulb).
To access bulbs, pull off protective
covers.
Low beam 1. Remove protective cover.
2. Detach connector from bulb.
3. Disengage wire clip and remove bulb from reflector.
4.Insert new bulb in reflector so that
the locating tab of the bulb aligns
with the reflector recess.
5. Attach connector to bulb.
6. Engage wire clip.
7. Install protective cover.
High beam 1. Remove protective cover.
2. Detach connector from bulb.
3. Disengage wire clip and remove bulb from reflector.4.Insert new bulb in reflector so that
the bulb aligns with the reflector
recess.
5. Engage wire clip and attach connector onto bulb.
6. Install protective cover.
Sidelight 1. Remove protective cover. Withdraw bulb holder from
reflector by turning anticlockwise.
Page 137 of 183
Vehicle care135
2. Remove bulb from socket, insertnew bulb.
3. Insert bulb holder in reflector. 4. Rotate clockwise to engage.
5. Install protective cover.
Daytime running light 1. Remove protective cover.2. Withdraw bulb holder from reflector by turning anticlockwise.
3. Remove bulb from socket, insert new bulb.
4. Insert bulb holder in reflector. 5. Rotate clockwise to engage.
6. Install protective cover.
Front turn signal light 1. Remove protective cover.2. Withdraw bulb holder from reflector by turning anticlockwise.
3. Push bulb into holder slightly, rotate anticlockwise, remove and
renew bulb.
4. Insert bulb holder in reflector. 5. Rotate clockwise to engage.
6. Install protective cover.