OperationFunc-
tion
buttonFunction
OFFSwitch off and switch on the Climatronic.
SETUP
The air conditioning settings submenu is
opened. It is possible to make the following
adjustments:
Function button Air conditioning profile.
: to ad-
just the level of the fan in AUTO mode. You
can choose between low, medium and
high.
Function button Automatic air recirculation
to
switch on and off automatic air recircula-
tion ››› page 160.
BACK
function button to close the sub-
menu. Adjust using the Easy Connect sys-
t
em* 3 Ap
p
lies to vehicles with a Media System Plus/Navi
System.
In the Easy Connect system it is also possible
to perform various adjustments to the Clima-
tronic.
Open the air conditioner menu
● Press the Set
up button.
On the t op of
the screen you can see and
change the current settings, such as, for ex-
ample, the temperature set for the driver side
and for that of passenger. Temperatures up to +22°C (+72°F) are shown with blue arrows,
and temper
atures over +22°C (+72°F) with
red arrows.
To switch a function on or off, or to select a
submenu, you must press the corresponding
function button.
Function buttonFunction
Air condi-
tioning pro- fileAdjust the fan level in AUTO mode. You
can choose between low, medium and
high.
OFFClimatronic is switched off.
ONClimatronic is switched on.
SETUP
The air conditioning settings submenu
is opened. It is possible to make the fol-
lowing adjustments:
Function button Air conditioning profile.
: to
adjust the level of the fan in AUTO
mode. You can choose between low, me-
dium and high.
Function button Automatic air recirculation
to switch on and off automatic air recir-
culation
››› page 160.
BACK
function button to close the
submenu.
Automatic
supplemen-
tary heating
Activate/deactivate the automatic acti-
vation of the supplementary heating for
colder countries (only for engines with
supplementary heating). With the option
deactivated, depending on the outside
temperature the heating may need more
time than normal to reach a comfortable
temperature. Air conditioning user instructions
The interior cooling system only works when
the en
gine i
s running and fan is switched on.
The air conditioner operates most effectively
with the windows and the panoramic sliding
sunroof closed. However, if the vehicle has
heated up after standing in the sun for some
time, the air inside can be cooled more quick-
ly by opening the windows and the panoram-
ic sliding sunroof briefly.
Climatronic: change the temperature unit on
the screen of the radio or on the factory-fit-
ted navigation system
Changing the temperature display from Cel-
sius to Fahrenheit on radio or on the factory-
fitted navigation system is done using the
menu on the instrument panel
››› page 29.
The cooling system cannot be activated
If the air conditioning system cannot be
switched on, this may be caused by the fol-
lowing: ● The engine is not running.
● The fan is switched off.
● The air conditioner fuse has blown.
● The outside temperature is lower than ap-
pr o
ximately +3°C (+38°F).
158
Air conditioning
● The air c onditioner c
ompressor has been
temporarily switched off because the engine
coolant temperature is too high.
● Another fault in the vehicle. Have the air
conditioner c
hecked by a specialised work-
shop. Special Characteristics
If the humidity
and temperature outside the
vehicle are high, condensation can drip off
the evaporator in the cooling system and
form a pool underneath the vehicle. This is
normal and does not indicate a leak! Note
After starting the engine, any residual humid-
ity in the air c
onditioner could mist over the
windscreen. Switch on the defrost function as
soon as possible to clear the windscreen of
condensation. Air outlets
Fig. 161
On the dash panel: air vents Air vents
T
o en
sure proper heating, cooling and venti-
lation in the vehicle interior, air vents
››› Fig. 161 1 should remain open.
● Turn the corresponding thumbwheel (de-
t ai
l) in the required direction to open and
close the air vents. When the thumbwheel is in the position, the corresponding air vent
i
s closed.
● Change the air direction using the ventila-
tion gril
le lever.
There are other additional, non-adjustable air
vents in the dash panel 2 , in the footwell
and in the r e
ar area of the interior. Note
Food, medicine and other heat or cold sensi-
tiv e o
bjects should never be placed in front of
the air outlets as they may be damaged or
made unsuitable for use by the air coming
from the air vents. 159
Technical data
Advice
Operation
Emergencies
Safety
Air conditioning
Auxiliary heater (additional
he at
er)
Introduction The auxiliary heater runs on fuel from the ve-
hic
l
e's tank and can be used while you are
driving and when the vehicle is stationary.
The auxiliary heater can be switched on using
the fast heating button of the air condition-
ing controls, with the remote control or by
previously programming a departure time in
the auxiliary heater menu of the infotainment
system.
In winter, with the auxiliary heater switched
on, you can defog the windscreen and leave
it free of ice and snow (if it is a thin layer) be-
fore you start driving.
If the outside temperature is very high, the
vehicle interior can be ventilated with the en-
gine off using the auxiliary heater. WARNING
Swallowing a battery with a 20 mm diameter
or an y
other button battery can cause serious
and even fatal injuries within a very short
time.
● Always keep the remote control, keyrings
with b
atteries, the spare batteries, button
batteries and all other batteries over 20 mm
out of reach of children. ●
If
you suspect that someone may have
swallowed a battery, seek immediate medical
attention. WARNING
The auxiliary heater exhaust fumes contain
c arbon mono
xide, an odourless and colour-
less toxic gas. Carbon monoxide can cause
people to lose consciousness. It can also
cause death.
● Never switch on the auxiliary heater or
le
ave it running in enclosed spaces or areas
with no ventilation.
● Never programme the auxiliary heater so
that
it switches itself on and is running in an
enclosed space or an area with no ventila-
tion. WARNING
The components of the auxiliary heater are
e xtr
emely hot and could cause a fire.
● Always park your vehicle so that no part of
the exh
aust system can come in contact with
easily flammable materials that might be be-
low the vehicle, such as dried grass. CAUTION
Never place food, medicines or other temper-
at ur
e-sensitive objects close to the air vents.
Food, medicines and other objects sensitive
to heat or cold may be damaged or made un- suitable for use by the air coming from the
v
ent
s. Note
After switching the engine on with a 12-volt
b att
ery that is heavily discharged or newly
changed or after a jump start some system
settings (such as the time, the date, the per-
sonalised comfort settings and the program-
ming) might be altered or deleted. Check and
correct these settings once the battery is suf-
ficiently charged. Switching on and off the auxiliary
he
at
er
Switching the auxiliary heater on:
Manually with the fast heating button of the air
conditioner controls. The control lamp of the
button will light up
››› page 156.
Manually with the remote control
››› page 162.
Automatically by programming and activating a
departure time ››› page 163.
Switching the auxiliary heater off:
Manually with the fast heating button of the air
conditioner controls. The control lamp of the
button goes off
››› page 156.
Manually with the remote control
››› page 162.» 161
Technical data
Advice
Operation
Emergencies
Safety
Air conditioning
The battery is located beneath a cover on the
b ac
k of the remote control.
● To open the cover, lift it slightly at the bot-
tom and s
lide it down.
● Remove the old battery.
● Insert the new battery. When doing so, take
into ac
count the polarity and use batteries of
the same type ››› .
● Replace the battery cover by inserting the
t ab
s at the top and pressing the bottom.
Range
The receiver is inside the vehicle. The remote
control, when fitted with new batteries, has a
range of several hundred metres. Obstacles
between the remote control and the vehicle,
bad weather conditions and discharged bat-
teries can considerably reduce the range of
the remote control. CAUTION
● The r a
dio frequency remote control con-
tains electronic components. Therefore, avoid
getting it wet and exposing it to knocks or di-
rect sunlight.
● The use of inappropriate batteries may
dam
age the radio frequency remote control.
For this reason, always replace the used bat-
tery with another of the same voltage, size
and specifications. For the sake of the environment
● Ple
ase dispose of your used batteries cor-
rectly and with respect for the environment.
● The remote control battery may contain
perc
hlorate. Observe the legal provisions re-
garding disposal.
● Care should be taken so as not to operate
the remot
e control unintentionally so as to
prevent the auxiliary heater being switched
on accidentally. Programming the auxiliary heater
Before pr
ogramming it, check that the vehi-
c
le's date and time are set correctly ››› .
The aux i
liary heater is programmed in the
Auxiliary heater menu of the infotain-
ment system.
Open the Auxiliary heater menu.
● Press the button in the C
limatronic
control panel.
● Press the fu
nction button.
Function button: function
Switch off: The auxiliary heater is immediately switched
off.
Function button: function
Heat, Ventilate: Set to heat or ventilate the vehicle interi-
or when the auxiliary heater is switched on. By pressing
the function button
, you can select the desired
mode.
Set: Opens the Auxiliary heater menu.
Departure time 1, Departure time 2, Departure time 3:
Three different departure times (hh.mm) may be
programmed. If the auxiliary heater should only
be switched on a certain day of the week, this can
also be selected.
Duration: The duration determines the operating
time of the auxiliary heater when switched on us-
ing the fast heating button
on the air condi-
tioning controls. The duration is also used to cal-
culate the departure time for the manual air con-
ditioner. It can be set between 10 and 60 mi-
nutes at 10-minute intervals.
This returns to the main menu.
The programmed departure time determines
the ap
pr
oximate time it should take to reach
the temperature set in the vehicle. The start
of the heating operation is determined auto-
matically depending on the outside tempera-
ture.
Checking the programming
When a departure time is activated and the
ignition is switched off the control lamp of
the fast heating button lights up for approx-
imately 10 seconds. »
163
Technical data
Advice
Operation
Emergencies
Safety
Operation
WARNING
Never programme the auxiliary heater so that
it sw
itches itself on and is running in an en-
closed space or an area with no ventilation.
The auxiliary heater exhaust fumes contain
carbon monoxide, an odourless and colour-
less toxic gas. Carbon monoxide can cause
people to lose consciousness. It can also
cause death. Operating instructions
The auxiliary heater exhaust system located
belo
w the
vehicle must be kept clear of snow,
mud and other objects. The exhaust fumes
must be able to exit freely. The emissions
generated by the auxiliary heater are re-
moved via an exhaust pipe fitted underneath
the vehicle.
On heating the vehicle interior, depending on
the outside temperature, the warm air is first
directed at the windscreen and then to the
rest of the vehicle interior through the air
vents. Directing the diffusers – towards the
windows for example – can affect air distribu-
tion.
When will the auxiliary heater not be activa-
ted?
● The auxiliary heater requires about as
muc h po
wer as the dipped beam headlights.
If the 12-volt battery charge is too low, the auxiliary heater switches off automatically
and c
annot
be switched on. This avoids prob-
lems when starting the engine.
● The heating must be activated every time
you w
ant to set off. Similarly, the departure
time must reactivate each time.
● The control lamp (fuel
level indicator)
lights up. Note
● Noi se
s will be heard while the auxiliary
heater is running.
● When the air humidity is high and the in-
side t
emperature low, condensation from the
heating and ventilating system may evapo-
rate when the auxiliary heater is switched on.
In this case, steam may be released from un-
derneath the vehicle. This does not mean
that there is a vehicle malfunction.
● If the vehicle is tilted, e.g. if parked on a
slope, the oper
ation of the auxiliary heater
may be restricted if the fuel tank level is low
(just above the reserve level).
● If the auxiliary heater is used a number of
times
for a long period of time, the 12-volt
battery will lose its charge. To recharge the
battery, the vehicle must be driven for a num-
ber of kilometres from time to time. As a
guideline: The journey should last approxi-
mately as long as the heater was connected.
● At temperatures below +5°C (+41°F), the
auxi
liary heater may switch itself on automat-
ically when the engine is switched on. The auxiliary heater is switched off again after a
c
er
tain time.164
Driving
Driving St ar
t and stop the engine
Switching the ignition on and starting
the engine with the key Fig. 163
Ignition key positions. Read the additional information carefully
› ›
› page 23
Diesel engines can take a few seconds longer
than usual to start on cold days. Therefore
the clutch pedal (manual gearbox) or the
brake pedal (automatic gearbox) must re-
main pressed until the engine starts up. Dur-
ing preheating, the warning lamp remains
lit.
The preheating time depends on the coolant
and exterior temperatures. With the engine at
operating temperature, or at outside temper-
atures above +8°C, the warning lamp will light up for about one second. This means
that
the engine starts immediately.
If the engine does not immediately start up,
interrupt the starting process and try again
after 30 seconds. To start the engine again,
return the key to position 1 .
St ar
t-Stop System*
If the vehicle is stopped and the Start-Stop
system* switches off the engine, the ignition
remains switched on.
Automatic gearbox: before leaving the vehi-
cle, make sure that the ignition is switched
off and the selector lever is in position P.
Driver messages on the instrument panel
display
Press the clutch
This message appears on vehicles with a
manual gearbox if the driver tries to start the
engine without having the clutch pedal
pressed. The engine will only start if you
press the clutch pedal.
Press the brake This message appears on vehicles with an
automatic gearbox if the driver tries to start
the engine without having the brake pedal
pressed. Select N or P
This
message appears if you try to start or
stop the engine when the selector lever of
the automatic gearbox is not in position P or
N. The engine can only start or stop in certain
positions.
Engage position P; the vehicle
can move; doors can only close in
position P.For safety reasons, this driver message ap-
pears and an audible warning sounds if the
selector lever of the automatic gearbox is not
in position P after you switch off the ignition.
Put the selector lever in position P, otherwise
the vehicle could roll away.
Gear change: selector lever in
the drive position! This driver message is displayed when the
selector lever is not in the position P when
the driver door is opened. Additionally, a
buzzer will sound. Put the selector lever in
position P, otherwise the vehicle could roll
away.
Ignition is switched on
This driver message is displayed and a buz-
zer is sounded when the driver door is
opened with the ignition switched on. »
165
Technical data
Advice
Operation
Emergencies
Safety
Operation
the vehicle or manually turns off the light, the
s ide light
goes out. WARNING
Any accidental movement of the vehicle could
r e
sult in serious injury.
● When switching on the ignition, do not
pr
ess the brake or clutch pedal, otherwise
the engine could start immediately. WARNING
If vehicle keys are used negligently or with-
out due c
are, this may cause accidents and
serious injury.
● Never leave any key inside the vehicle
when ex
iting. Otherwise, a child or unauthor-
ised person could lock the vehicle, start the
engine or connect the ignition and, in this
way, operate electronic equipment (e.g. the
windows). Note
● Bef
ore leaving the vehicle, always discon-
nect the ignition manually and, if appropri-
ate, take into account the instructions on the
screen of the dash panel.
● If the vehicle is stationary for a long time
with the ignition on, the
vehicle battery
might be discharged and it might not be pos-
sible to start the engine.
● In diesel vehicles, there may be a delay in
the engine s
tarting if it requires preheating. ●
If durin
g the STOP phase you press the
START ENGINE STOP button, the ignition is
sw it
ched off and the button flashes.
● If the indication “Start-Stop system deacti-
vat
ed: Start the engine manually” is dis-
played on the dash panel display, the START ENGINE STOP button will blink.
Starting the engine
3
Valid for vehicles: with Keyless Access
StepStarting the engine with the starter but-
ton ››› page 167 (Press & Drive).
1.Press and hold the brake pedal until step 5 is
performed.
1a.In vehicles with a manual gearbox: press and
hold the clutch down until the engine starts.
2.Put the gearbox lever in neutral or the selector
lever in position P or N.
3.
Briefly press the starter button ››› Fig. 164 with-
out pressing the accelerator. For the engine to
start there must be a valid key in the vehicle.
After starting the engine, the light of the START ENGINE STOP
button changes to a fixed
light indicating that the engine has started.
4.If the engine does not start, stop and wait for
approx. 1 minute before trying again. If neces-
sary, perform an emergency start ››› page 167.
5.Disconnect the electronic parking brake when
you are about to start driving ››› page 170. WARNING
Never leave the vehicle with the engine run-
nin g, e
specially if a gear or gear range is en-
gaged. The vehicle could then suddenly move
or something strange could happen that
would cause damage, fire or serious injury. WARNING
Cold start sprays could explode or cause a
s ud
den increase in the engine speed.
● Never use sprays to cold start the engine. CAUTION
● The s t
arter motor or the engine may be
damaged if you try to start the engine while
driving or if you restart it immediately after
switching it off.
● If the engine is cold, avoid high engine
speed
s, pushing the engine too hard and rap-
id acceleration.
● Do not start the engine by pushing the ve-
hicl
e or towing it. Unburnt fuel could enter
the catalytic converter and damage it. Note
● Do not w
ait until the engine warms up with
the vehicle stationary; if you have good visi-
bility through the windows, start driving im-
mediately. This helps the engine reach oper-
ating temperature faster and reduces emis-
sions. 168
Driving
●
Bef
ore driving down a long, steep gradient,
it is advisable to reduce speed and select a
lower gear. This makes use of engine braking
and relieves the brakes. If you still have to
use the brakes, it is better to brake firmly at
intervals than to apply the brakes continu-
ously. Note
● If the br
ake servo is out of action, for exam-
ple when the car is being towed, you will
have to press the brake pedal considerably
harder than normal to make up for the lack of
servo assistance.
● If you wish to equip the vehicle with acces-
sories
such as a front spoiler or wheel covers,
it is important that the flow of air to the front
wheels is not obstructed, otherwise the
brakes can overheat. Front assist system
Electronic stability control (ESC)
The E
SC
helps to improve safety. It reduces
the tendency to skid and improves the stabil-
ity and roadholding of the vehicle. The ESC
detects critical handling situations, such as
vehicle understeer or oversteer, or wheelspin
on the driving wheels. It stabilises the vehi-
cle by braking individual wheels or by reduc-
ing the engine torque. The warning lamp will flash on the instrument panel when the ESC
is
intervening .
The ESC includes the anti-lock brake system
(ABS), the front assist system (HBA), the trac-
tion control system (ASR), electronic differen-
tial lock (EDS), electronic torque control
(XDS) and tractor-trailer sway mitigation*.
ESC also helps stabilise the vehicle by chang-
ing the torque.
Anti-lock brake system (ABS)
ABS prevents the wheels from locking up un-
der braking until the vehicle has reached a
virtual standstill. You can continue to steer
the vehicle even when the brakes are on full.
Keep your foot on the brake pedal and do not
pump the brakes. You will feel the brake ped-
al pulsate while the ABS is working.
Front assist system (HBA)
The brake assist system can reduce the re-
quired braking distance. The braking force is
automatically boosted if you press the brake
pedal quickly in an emergency. You must
keep pressing the brake pedal until the dan-
ger has passed.
Traction control system (ASR)
In the event of wheelspin, the traction control
system reduces the engine torque to match
the amount of grip available. This helps the car to start moving, accelerate or climb a gra-
dient.
El
ectronic differential lock (EDL)
When the EDL detects wheelspin, it brakes
the spinning wheel and directs the power to
the other driven wheel. This function is active
up to approximately 100 km/h (62 mph).
To prevent the disc brake of the braked wheel
from overheating, the EDL cuts out automati-
cally if subjected to excessive loads. The ve-
hicle can still be driven. The EDL will switch
on again automatically when the brake has
cooled down.
Tractor-trailer sway mitigation*
If the vehicle is pulling a trailer, it will control
the following: Tractor-trailers tend to sway.
When the swaying of the trailer is felt by the
vehicle and detected by the ESC, it will auto-
matically brake the towing vehicle within the
limits of the system and mitigate the sway.
Tractor-trailer sway mitigation is not available
in all countries.
Electronic torque management (XDS)
When taking a curve, the driveshaft differen-
tial mechanism allows the outer wheel to turn
at a higher speed than the inner wheel. In
this way, the wheel that is turning faster (out-
er wheel) receives less drive torque than the
inner wheel. This may mean that in certain »
173
Technical data
Advice
Operation
Emergencies
Safety