Page 129 of 255
Climate control127Note
Refrigerant R-134a contains
fluorinated greenhouse gases with a
global warming potential of 1430.
Front air conditioning system is filled with 0.58 kg and has a CO 2
equivalent of 0.83 tonnes, the front
and rear air conditioning system in Combi variants is filled with 1.1 kg
and has a CO 2 equivalent of
1.57 tonnes and the front and rear air
conditioning system in Bus variants
is filled with 1.7 kg and has a CO 2
equivalent of 2.43 tonnes.
Page 130 of 255

128Driving and operatingDriving and
operatingDriving hints ............................... 129
Driving economically ...............129
Control of the vehicle ...............129
Steering ................................... 129
Starting and operating ...............130
New vehicle running-in ............130
Ignition switch positions ...........130
Starting the engine ..................130
Idle speed control ....................131
Overrun cut-off ........................ 131
Stop-start system ....................132
Parking .................................... 134
Air suspension ......................... 135
Engine exhaust .......................... 137
Diesel particle filter ..................137
Catalytic converter ...................137
AdBlue ..................................... 138
Manual transmission ..................145
Manual transmission automa‐ ted .............................................. 145
Transmission display ...............145
Starting the engine ..................146
Selector lever .......................... 146Manual mode........................... 147
Electronic driving programmes 147
Fault ........................................ 148
Interruption of power supply ....149
Brakes ........................................ 149
Antilock brake system .............149
Parking brake .......................... 150
Brake assist ............................. 151
Hill start assist ......................... 151
Ride control systems .................151
Traction Control system ..........151
Electronic stability program .....152
Limited-slip rear axle ...............154
Driver assistance systems .........154
Cruise control .......................... 154
Speed limiter ........................... 158
Parking assist .......................... 158
Rear view camera ...................160
Lane departure warning ..........162
Fuel ............................................ 163
Fuel for diesel engines ............163
Refuelling ................................ 164
Fuel consumption - CO 2-
Emissions ............................... 165
Trailer hitch ................................ 166
General information .................166
Driving characteristics and towing tips .............................. 166
Trailer towing ........................... 166Towing equipment ...................167
Trailer stability assist ...............167
Auxiliary features .......................167
Power take-off ......................... 167
Page 131 of 255

Driving and operating129Driving hints
Driving economically
ECO mode ECO mode is a function that
optimises fuel consumption. It affects
engine power and torque,
acceleration, gear shift indication,
heating, air conditioning and electrical consumers.
ActivationPress ECO. Control indicator
illuminates when activated and a corresponding message appears in
the Driver Information Centre 3 98.
During driving, it is possible to
temporarily disable ECO mode, e.g.
to increase engine performance, by
depressing the accelerator pedal
firmly.
ECO mode is reactivated when
pressure is reduced on the
accelerator pedal.
Deactivation
Press ECO again. Control indicator
extinguishes.
Control of the vehicle
Never coast with engine not
running (except during Autostop)
Many systems will not function in this
situation (e.g. brake servo unit, power
steering). Driving in this manner is a
danger to yourself and others. All
systems function during an Autostop,
but there will be a controlled reduction
in power steering assist and vehicle
speed is reduced.Stop-start system 3 132.
Pedals To ensure the pedal travel is
uninhibited, there must be no mats in
the area of the pedals.
Use only floor mats which fit properly
and are fixed by the retainers on the
driver's side.
Steering
If power steering assist is lost
because the engine stops or due to a system malfunction, the vehicle can
be steered but may require increased
effort.Caution
Vehicles equipped with hydraulic
power steering:
If the steering wheel is turned until it reaches the end of its travel, and
is held in that position for more
than 15 seconds, damage may
occur to the power steering
system and there may be loss of
power steering assist.
Page 132 of 255

130Driving and operatingStarting and operating
New vehicle running-in
Do not brake unnecessarily hard for
the first few journeys and after new
disc brake pads have been fitted.
During the first drive, smoke may
occur because of wax and oil
evaporating off the exhaust system.
Park the vehicle in the open for a
while after the first drive and avoid
inhaling the fumes.
During the running-in period fuel and engine oil consumption may be
higher and the cleaning process of
the diesel particle filter may take
place more often. Autostop may be
inhibited to allow for charging the
vehicle battery.
Stop-start system 3 132.
Diesel particle filter 3 137.Ignition switch positions0:ignition off1:steering wheel lock released,
ignition off2:ignition on
diesel engines: preheating3:starting
Steering wheel lock
Remove key from ignition switch and
turn steering wheel until it engages.
9 Danger
Never remove the key from
ignition switch during driving as
this will cause steering wheel lock.
Starting the engine
Manual transmission: operate clutch.
Manual transmission automated:
operate brake; transmission
automatically shifts to N.
Do not accelerate.
Page 133 of 255

Driving and operating131Turn the key to position 2 for
preheating, and hold until control
indicator N extinguishes from the
Driver Information Centre.
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 3 132.
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 the
switch. 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.
● MTA is not in N (neutral).
● Vehicle speed is above 0 km/h. ● Control indicator A, W or C
illuminate in the instrument
cluster.
To increase or decrease the fast idle
speed rate, consult a workshop.
Note
When the fast idle function is
activated, the stop-start system is
automatically deactivated.
Stop-start system 3 132.
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 pedal is released.
Depending on driving conditions, the
overrun cut-off may be deactivated.
Page 134 of 255

132Driving and operatingStop-start systemThe stop-start system helps to save
fuel and to reduce the exhaust
emission. 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 starts the engine
automatically as soon as the clutch is
depressed. A vehicle battery sensor
ensures that an Autostop is only
performed if the vehicle battery is
sufficiently charged for a restart.
Activation
The 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 Î.
Deactivation is indicated when the
LED in the button illuminates.
Note
When the fast idle function is
activated, the stop-start system is
automatically deactivated and
cannot be reactivated by pressing
Î . LED in button illuminates to
indicate deactivation and a
corresponding message may
appear in the Driver Information
Centre 3 98.
Idle speed control 3 131.
Autostop
If the vehicle is at low speed or
standstill, activate an Autostop as
follows:
● depress the clutch pedal
● shift the selector lever to neutral (manual transmission) or N
(manual transmission
automated)
● release the clutch pedal
The engine will be switched off while
the ignition stays on if the required conditions are met.
Page 135 of 255

Driving and operating133An Autostop is indicated when Ï
illuminates green in the instrument
cluster.
During an Autostop, the heating
performance, power steering and
brake performance will be
maintained. Brake assist, however, is
not available 3 151.
Note
If you exit the vehicle while the
engine is in an Autostop, a warning
chime will sound as a reminder that
the engine is on standby and has not been switched off.
Conditions for an Autostop
The stop-start system checks if each
of the following conditions is fulfilled,
otherwise an Autostop will be
inhibited and control indicator \ will
illuminate in the instrument cluster.
● the stop-start system is not manually deactivated
● the bonnet is fully closed
● the driver's door is closed or the driver's seat belt is fastened
● the vehicle battery is sufficiently charged and in good condition● the engine is warmed up
● the engine coolant temperature is
not too high
● the ambient temperature is not too low
● the defrosting function is not activated
● the climate control system does not inhibit an Autostop
● the brake vacuum is sufficient ● the self-cleaning function of the diesel particle filter is not active
● the vehicle has moved since the last Autostop
Otherwise an Autostop will be
inhibited.
An Autostop may become
unavailable as the ambient
temperature approaches freezing
point.
Certain settings of the climate control system may also inhibit an Autostop.See "Climate control" chapter for
further information 3 112.
Immediately after motorway driving
an Autostop may be inhibited.Autostop may also be inhibited
temporarily if the vehicle battery has
been recharged by an external
source.
New vehicle running-in 3 130.
Vehicle battery discharge protection
To ensure reliable engine restarts,
several vehicle battery discharge
protection features are implemented
as part of the stop-start system.
Restart of the engine by the driver
Depress the clutch pedal to restart the
engine.
If the selector lever has been shifted
out of neutral (manual transmission)
or N (manual transmission
automated) or other conditions are
not met, start using the ignition key.
The green control indicator Ï will
extinguish in the instrument cluster
when the engine is restarted.
If the selector lever is shifted out of
neutral (manual transmission) or N
(manual transmission automated) before depressing the clutch first, a
restart will not take place.
Page 136 of 255

134Driving and operatingRestart of the engine by the stop-
start system
The selector lever must be in neutral(manual transmission) or N (manual
transmission automated) to enable an
automatic restart.
If one of the following conditions
occurs during an Autostop, the
engine will be restarted automatically
by the stop-start system. Control
indicator Ï will flash green in the
instrument cluster during an
automatic engine restart.
● the stop-start system is manually
deactivated
● the bonnet is opened
● the driver's seat belt is unfastened and the driver's door
is opened
● the engine temperature is too low
● the vehicle battery is discharged
● the brake vacuum is not sufficient
● the vehicle starts to move
● the defrosting function is activated● the climate control systemrequests an engine start
● the predetermined timing has been exceeded
If an electrical accessory, e.g. a
portable CD player, is connected to
the power outlet, a brief power drop during restart might be noticeable.
If the Infotainment system is active,
audio sound may briefly be reduced
or interrupted during the restart.
Warning chimes 3 99.
Fault
If control indicator Ï illuminates
yellow, there is a fault in the stop-start system 3 96. A corresponding
message also appears in the Driver
Information Centre 3 98. 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 brake
pedal at the same time to
reduce operating force.
● Switch off the engine.
● If the vehicle is on a level surface or uphill slope, engage
first gear. On an uphill slope,
turn the front wheels away from
the kerb.
If the vehicle is on a downhill
slope, engage reverse gear.
Turn the front wheels towards the kerb.