Page 71 of 187
Instruments and controls69
CNG fuel gauge
In natural gas operation mode, the
four vertical bars next to CNG
correspond to the methane level in
the cylinders. As the fuel level
diminishes, the bars in the CNG fuel
gauge disappear.
CNG and the one remaining bar will
flash if the methane level in the
cylinders is low.
Refuelling 3 120.
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 illumi‐
nates=petrol operation.
During natural gas operation, if
control indicator Y illuminates in the
Driver Information Centre (DIC)
3 79, the natural gas tanks are
empty and petrol operation is
automatically engaged.
Fuel for natural gas operation 3 119,
Refuelling 3 120.
Engine coolant
temperature gauge
Displays the coolant temperature.
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70Instruments and controls
C=engine operating
temperature not yet
reachedcentral
area=normal operating
temperatureH=temperature too high
If control indicator $ illuminates in
conjunction with a message in the
Driver Information Centre 3 79 the
coolant temperature is too high. Seek
the assistance of a workshop.
Caution
If engine coolant temperature is
too high, stop vehicle, switch off
engine. Danger to engine. Check
coolant level.
Service display
Service display is available in
vehicles with Multifunction version of the Driver Information Centre 3 79.
When the ignition is switched on, the remaining distance before the next
service is due is shown briefly. Based on driving conditions, the interval at
which a service will be indicated can
vary considerably.
When the remaining distance before
the next service is less than
1,250 miles, Serv. appears in the
Driver Information Centre. The service reminder is repeated after
every additional 125 miles and
becomes more frequent when the
remaining distance is below
125 miles.
The vehicle needs a service. Seek the
assistance of a workshop.
The remaining distance to the next
service may also be viewed in the
Driver Information Centre by
selecting SERVICE from the settings
menu options 3 79.
Resetting the service display After a service, the service displaymust be reset by a workshop.
Control indicators The control indicators described are
not present in all vehicles. The
description applies to all instrument
versions. Depending on the
equipment, the position of the control
indicators may vary.
When the ignition is switched on,
most control indicators will illuminate
briefly as a functionality test.
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76Instruments and controls
Interference due to external sources
of ultrasound. Once the source of
interference is removed, the system
will operate normally.
Have the cause of the fault in the
system remedied by a workshop.
Depending on version, 9 will
illuminate as an alternative if control
indicator r is not present. A
warning message may also be
displayed in the Driver Information
Centre 3 79.
Generic warning 9 3 73.
Ultrasonic parking assist 3 116.
Electronic Stability
Program
x illuminates or flashes yellow.
Flashes
The system is actively engaged.
Engine output may be reduced and
the vehicle may be braked
automatically to a small degree.Illuminates
A fault in the system is present.
Continued driving is possible. Driving
stability, however, may deteriorate
depending on road surface
conditions.
Have the cause of the fault remedied
by a workshop.
Electronic Stability Program (ESP)
3 114, Traction control system/Anti-
Slip Regulator (ASR) 3 113.
Engine coolant
temperature $ illuminates red.
Illuminates for a few seconds after the ignition is switched on.
If control indicator $ illuminates in
conjunction with a message in the
Driver Information Centre, the coolant
temperature is too high. Seek the
assistance of a workshop.
Driver Information Centre 3 79.Caution
If engine coolant temperature is
too high, stop vehicle, switch off
the ignition. Danger to engine.
Check coolant level.
If the control indicator remains on, seek the assistance of your
workshop.
Engine coolant temperature gauge
3 69.
Preheating ! illuminates yellow.
Preheating is activated. Only
activates when outside temperature
is low.
Diesel particle filter
[ illuminates yellow.
The diesel particle filter requires
cleaning.
Page 106 of 187

104Driving and operating
ActivationThe stop-start system is available as
soon as the engine is started, the
vehicle starts-off and the conditions
as stated below in this section are
fulfilled.
Deactivation
Deactivate the stop-start system
manually by pressing the ^ button in
the centre console. LED in the button
illuminates to confirm deactivation.
Autostop
If the vehicle is at a low speed or at a
standstill, activate an Autostop as
follows:
■ Depress the clutch pedal
■ set the lever to neutral
■ release the clutch pedal
The engine will be switched off while the ignition stays on.
An Autostop is indicated when control indicator ^ flashes in the Driver
Information Centre 3 79.
During an Autostop, the heating and
brake performance will be
maintained.Caution
The steering assist can be
reduced during an Autostop.
Conditions for an Autostop
The stop-start system checks if each
of the following conditions is fulfilled.
Otherwise an Autostop will be
inhibited.
■ The stop-start system is not manually deactivated
■ the bonnet is fully closed
■ the driver's door is closed and the driver's seat belt is fastened
■ the battery is sufficiently charged and in good condition
■ the engine is warmed up
■ the engine coolant temperature is not too high
■ the engine exhaust temperature is not too high, e.g. after driving with
high engine load
Page 127 of 187

Vehicle care125Vehicle careGeneral Information...................125
Vehicle checks ........................... 126
Bulb replacement .......................132
Electrical system ........................138
Vehicle tools .............................. 142
Wheels and tyres .......................142
Jump starting ............................. 152
Towing ....................................... 153
Appearance care .......................155General Information
Accessories and vehicle
modifications
We recommend the use of genuine parts and accessories and factory
approved parts specific for your
vehicle type. We cannot assess or
guarantee reliability of other products
- even if they have a regulatory or
otherwise granted approval.
Do not make any modifications to the electrical system, e.g. changes of
electronic control units (chip tuning).Caution
When transporting the vehicle on
a train or on a recovery vehicle, the
mud flaps might be damaged.
Vehicle storage
Storage for a long period of time
If the vehicle is to be stored for several months:
■ Wash and wax the vehicle.
■ Have the wax in the engine compartment and underbody
checked.
■ Clean and preserve the rubber seals.
■ Fill up fuel tank completely.
■ Change the engine oil.
■ Drain the washer fluid reservoir.
■ Check the coolant antifreeze and corrosion protection.
■ Adjust tyre pressure to the value specified for full load.
■ Park the vehicle in a dry, well ventilated place. Engage first orreverse gear to prevent the vehicle
from rolling.
■ Do not apply the parking brake.
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126Vehicle care
■ 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 lockingsystem.
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 130 of 187
128Vehicle careCaution
It is the owner's responsibility to
maintain the proper level of an
appropriate quality oil in the
engine.
Insert dipstick to the stop on the
handle and make half a turn.
When the engine oil level has
dropped to the MIN mark, top up
engine oil.
We recommend the use of the same
grade of engine oil that was used at
last change.
The engine oil level must not exceed
the MAX mark on the dipstick.
Caution
Overfilled engine oil must be
drained or suctioned out.
Capacities 3 173.
Fit the cap on straight and tighten it.
Engine coolant
The coolant provides freeze
protection down to approx. -28 °C. In
northern countries with very low
temperatures, the factory filled
coolant provides frost protection
down to approx. -37°C.Caution
Only use approved antifreeze.
Coolant level
Caution
Too low a coolant level can cause engine damage.
Page 131 of 187
Vehicle care129
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.
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.