116Driving and operating● Battery voltage too low.
● Overload of the central locking system by operating at frequentintervals, the power supply is
interrupted for a short time.
● Interference from higher-power radio waves from other sources.
Battery replacement 3 20.
Central locking system 3 23.
Electronic key system 3 22.
Starting the engine
Manual transmission: operate clutch.
Do not accelerate.
Diesel engines: turn the key to
position 2 for preheating until control
indicator ! extinguishes in the
instrument cluster 3 87.
Turn key to position 3 and release.
The increased engine speed
automatically returns to normal idling
speed as the engine temperature
rises.
Start attempts should not last longer
than 15 seconds. If engine does not
start, wait 15 seconds before
repeating starting procedure. If
necessary, depress accelerator
before repeating starting procedure.
Before restarting or to switch off the
engine, turn key back to 0.
During an Autostop, the engine can
be started by depressing the clutch
pedal. Stop-start system 3 117.
Turbo engine warm-up Upon start-up, engine available
torque may be limited for a short time,
especially when the engine
temperature is cold. The limitation is
to allow the lubrication system to fully protect the engine.Idle speed control
To increase the idle speed, press theswitch. After a few seconds the
function will be activated.
The function will be deactivated
when:
● The clutch pedal is depressed.
● The accelerator pedal is depressed.
● Vehicle speed is above 0 mph.
● Control indicator F, W or C
illuminate in the instrument
cluster.
To increase or decrease the fast idle
speed rate, consult a workshop.
Driving and operating117Notice
When the fast idle function is
activated, the stop-start system is
automatically deactivated.
Stop-start system 3 117.
Vehicle shutdown
Fuel cut-off system
If the vehicle runs out of fuel, the fuel
system is cut-off and must be reset
after refuelling. A corresponding
warning message may also appear in
the Driver Information Centre (DIC)3 89.9 Danger
If you can smell fuel in the vehicle,
or a fuel leak is present, have thecause of this remedied
immediately by a workshop. Do
not reset the fuel cut-off system, to avoid the risk of fire.
Resetting with remote control
key / manual key
To reset the fuel cut-off system and
enable the vehicle to be driven:
1. Turn the ignition key to position 2
3 114.
2. Wait a few minutes to allow the fuel system to be reset.
3. Turn key to position 3 to start the
engine.
If the engine does not start, repeat the
procedure.
Resetting with electronic key
system
To reset the fuel cut-off system and
enable the vehicle to be driven:
1. Insert the electronic key in the card reader 3 114.
2. Press START/STOP without
depressing any pedals.
3. Wait a few minutes to allow the fuel system to be reset.
If the engine does not start, repeat the procedure.
Electronic key system 3 22.Power button 3 114.
Refuelling 3 138.
Overrun cut-off The fuel supply is automatically cut off
during overrun, i.e. when the vehicle
is driven with a gear engaged but
accelerator is released.
Stop-start system The stop-start system helps to save
fuel and to reduce the exhaust
emissions. When conditions allow, it
switches off the engine as soon as the
vehicle is at a low speed or at a
standstill, e.g. at a traffic light or in a
traffic jam. It restarts the engine
automatically as soon as the clutch
pedal is depressed.
A vehicle battery sensor ensures that
an Autostop is only performed if the
vehicle battery is sufficiently charged
for a restart.
124Driving and operatingNotice
If AdBlue must be refilled at very low temperatures, the refilling of AdBlue
may not be detected by the system.
In this case, park the vehicle in a
space with a higher ambient
temperature until AdBlue is
liquefied.
Notice
If engine starting is prohibited due to low Adblue level, we recommend
adding a volume of at least 10 litres
of AdBlue when refilling. Avoid minor
top-ups (e.g. less than 5 litres),
otherwise the system may not detect a refill.
Notice
When unscrewing the protective cap from the filler neck, ammonia fumesmay emerge. Do not inhale as the
fumes have a pungent smell. The fumes are not harmful by inhalation.Caution
In case of misfuelling, do not
switch on ignition.
The vehicle must be parked on a level surface.
The filler neck for AdBlue is located behind the fuel filler flap, located on
the left-hand side of the vehicle.
The fuel filler flap can only be opened
if the vehicle is unlocked and the left- hand door is opened.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 3 195.
Filling station
9 Danger
Follow the operating and safety
instructions of the filling station
when refilling Adblue.
1. Switch off engine and remove key
from ignition switch.
2. Pull fuel filler flap to open.
3. Unscrew protective cap (2) anticlockwise from the filler neck.
4. Fully insert the pump nozzle into the filler neck and switch it on.
5. When refilling is complete, mount the protective cap and turn
clockwise until it engages.
6. Close fuel filler flap and left-hand door.
Driving and operating125AdBlue canisterNotice
Only use the designated AdBlue
canisters for refilling, to prevent a
topping-up of too much AdBlue.
Additionally, the fumes in the tank
are captured in the canister and do
not emerge.
Notice
Since AdBlue has a limited
durability, check the date of expiry
before refilling.
1. Switch off engine and remove key
from ignition switch.
2. Pull fuel filler flap to open.3. Unscrew protective cap (2) anticlockwise from the filler neck.
4. Open AdBlue canister.
5. Mount one end of the hose on the
canister and screw the other end
on the filler neck.
6. Lift the canister until it is empty.
7. Unscrew the hose from the filler neck.
8. Mount the protective cap and turn
clockwise until it engages.
9. Close fuel filler flap and left-hand door.
Notice
Dispose of AdBlue canister and
hose according to environmental requirements.
Fault
If the system detects an operating fault, control indicator Y illuminates
together with F and a warning chime.
Seek the assistance of a workshop
immediately.
A corresponding message appears in the DIC 3 89.Manual transmission
To engage reverse, with the vehicle
stationary depress the clutch pedal, pull up the collar on the selector lever
and engage the gear against the
resistance.
If the gear does not engage, set the
lever in neutral, release the clutch
pedal and depress again; then repeat
gear selection.
Do not slip the clutch unnecessarily.
When operating, depress the clutch pedal completely. Do not use the
pedal as a foot rest.
138Driving and operatingFuel
Fuel for diesel engines Only use diesel fuel that complies
with EN 590. The fuel must have low
sulphur content (max. 10 ppm).
Equivalent standardised fuels with a
biodiesel (= FAME according to
EN14214) content of max. 7% by
volume (like DIN 51628 or equivalent
standards) may be used.
In countries outside the European
Union, use Euro-Diesel fuel with a
sulphur concentration below 50 ppm.Caution
Use of fuel that does not comply to EN 590 or similar can lead to
engine powerloss, increased wear
or engine damage and loss of
warranty.
Do not use marine diesel oils, heating
oils, Aquazole and similar diesel-
water emulsions. Diesel fuels must
not be diluted with fuels for petrol
engines.
The flow and filterability of diesel fuels are temperature-dependent. When
temperatures are low, refuel with
diesel fuel with guaranteed winter
properties.
Diesel fuel filter 3 150, diesel fuel
system bleeding 3 151.
Refuelling9 Danger
Before refuelling, switch off engine
and any external heaters with
combustion chambers.
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.
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.
Notice
To ensure the fuel level is displayed
correctly, the ignition must be
switched off before refuelling. Avoid
minor fuel top-ups (e.g. less than
5 litres) to ensure accurate readings.
The fuel filler flap is located on the left-
hand side of the vehicle.
The fuel filler flap can only be opened
if the vehicle is unlocked and the left-
hand door is opened.
Pull flap to open.
Vehicle care151
Drain filter of residual water at every
engine oil change.
Place a container underneath the
filter housing. Loosen the knurled
screw on the lower part of the filter by approx. one turn, to drain off the
water.
The filter is drained as soon as water-
free diesel fuel emerges. Retighten
the screw.
Check diesel fuel filter at shorter
intervals if the vehicle is subjected to
extreme operating conditions.
Diesel fuel system bleeding
If the fuel tank has been run dry, it will be necessary to air vent or bleed the
diesel fuel system.
Refuel then proceed as follows:
With ignition key
● Switch on the ignition (key to position 2) for 5 seconds at a
time.
● Switch off ignition (key to position
1 ) for 3 seconds.
● Repeat this process multiple
times.
● Start the engine (key to position 3) then switch off (key to position
0 ).
Ignition switch positions 3 114.
With power button
● Insert the electronic key in the card reader.
● Press START/STOP without
pressing any of the pedals.
● Wait a few minutes before starting engine.
Power button 3 114.
Vehicle care161No.Circuit1Adblue injection battery2Vehicle battery (with electronic
key system)3APC battery backup (with elec‐
tronic key system)4Heating and ventilation system5Adaptations6Adaptations7Heating and ventilation system8Additional heating and ventila‐
tion / air conditioning system9Supplementary heating and
ventilation system10Electric exterior mirrors / addi‐
tional adaptations11Heated exterior mirrors12Radio / multimedia / electric
exterior mirrors / diagnostic
socket13Multimedia / trailer hitchNo.Circuit14Courtesy lights / battery
discharge protection15Fuel injection system / tyre pres‐ sure monitoring system / elec‐
tronic key system16Hazard warning flashers / turn
and lane-change signals17Central locking18Left-hand high beam / right-
hand low beam / tail lights / left- hand daytime running light19Front fog lights / rear fog lights /
number plate lighting20Alarm / horn / lighting / wiper21Instrument cluster22Light switch23Rear window wiper / wind‐
screen washer pump / horn24APC general battery25Reversing lightsNo.Circuit26Brake switch27Fuel injection / starter28Airbag / steering column lock29Passenger power window30Power steering31Brake lights32APC battery backup (with elec‐
tronic key system)33Service display34Cigarette lighter / power outlet35Right-hand high beam / left-
hand low beam / sidelights /
right-hand daytime running light36Brake lights / ABS / immobiliser37Interior lighting / air conditioning38Starting with electronic key
system39Rear window wiper40Warning chimes
162Vehicle careNo.Circuit41Load compartment power outlet42Driver power window43Rear power outlet44Starting / body control module45Heated seats46Heating / air conditioning47Windscreen wiper48Tachograph
After having changed defective fuses,
replace the trim panel.
Vehicle tools
Tools
The jack, wheel wrench, wheel bolt
sleeve, torx key, adapters, wheel
cover hook, towing eye are contained
in a unit, stowed under the driver's
seat.
Slide seat forwards and fold the
backrest forwards 3 43 to access the
tool box. The tool box may be secured
in position with a wing nut.
Wheel changing 3 171, Spare wheel
3 172.
Vehicles with tyre repair kit: The
wheel cover hook and torx key are
stored within the tyre repair kit case,
stowed under the driver's seat.
Tyre repair kit 3 168.