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
OperationSwitching the auxiliary heater off:
Automatically once the programmed departure
time has arrived or after the programmed oper-
ating time has elapsed
››› page 163.
Automatically when the control lamp (fuel
level indicator) ››› page 276 lights up.
Automatically when the 12-volt battery charge
is too low ››› page 289. Special feature
Onc
e sw
itched off, the auxiliary heater will
continue to operate for a short period of time
in order to burn the fuel remaining in the sys-
tem and also to expel the exhaust fumes.
Remote control Fig. 162
Auxiliary heater: remote control.
Fig. 162Meaning
Switch the auxiliary heater on
Switch the auxiliary heater off
1Control lamp
If the buttons of the remote control are press-
ed u
nnec
essarily, it could switch on the auxil-
iary heater involuntarily, even when it is out
of range or when the control lamp is flashing.
Control lamp on the remote control
When the buttons are pressed, the control
lamp on the remote control provides the user
with different information:
Control lamp 1Meaning
It will light for about 2 sec-
onds in green.The auxiliary heater has
been switched on using
the
button.
It will light for about 2 sec-
onds in red.The auxiliary heater has
been switched off using
the
button.
It flashes green slowly for
approximately 2 seconds
(approximately 4 times per
second).No on a)
signal has been
received.
Control lamp 1Meaning
It flashes green quickly for
approximately 2 seconds
(approximately 10 times
per second).The auxiliary heater is
locked.
Possible causes: The fuel
tank is almost empty, the
12-volt battery charge is
too low or there is a fault.
It flashes red for approxi-
mately 2 seconds (approx-
imately 4 times per sec-
ond).No off a)
signal has been
received.
It will light for about 2 sec-
onds in orange, then
green or red.The remote control battery
is almost flat. However,
the on or off signal has
been received.
It will light for about 2 sec-
onds in orange, then it
flashes green or red.The remote control battery
is almost flat. No on or off
signal has been received.
It flashes orange for ap-
proximately 5 seconds.The remote control battery
is flat. No on or off signal
has been received.
a) The remote control is out of range. In this case it will be nec-
essary to get closer to the vehicle and press the corresponding
button again.
Replacing the remote control battery
If, when pressing the buttons of the remote
control, control lamp 1 flashes orange for
ap pr
oximately 5 seconds or it does not
switch on, the remote control battery will
need replacing.
162
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
Driving
remains switched on. Make sure that the igni-
tion i
s
switched off before leaving the
vehicle, otherwise the battery could dis-
charge. Starter button*
Fig. 164
In the lower part of the centre con-
so l
e: starter button. The vehicle engine can be started with a
s
t
arter button (Press & Drive). To do so, there
must be a valid key inside the vehicle in the
area of the front or rear seats.
In vehicles with the Keyless Access
››› page 112 system, the engine can also be
started with the key in the luggage compart-
ment.
Opening the driver's door when exiting the
vehicle activates the electronic lock on the
steering column if the ignition is disabled. Switching the ignition on/off manually
Briefly p
ush the starter button without touch-
ing the brake or clutch pedal ››› .
F or
vehicles with both manual and automatic
transmission, the starter button text START ENGINE STOP flashes like a heartbeat
when the sy s
tem is preset for switching the
ignition on and off.
Automatic ignition switch-off
If the driver leaves the vehicle, taking the ve-
hicle key with them but leaving the ignition
on, the ignition is switched off automatically
after a certain time. If at that time the dipped
beam is on, the parking lights will stay on for
approx. 30 minutes. The side light can be
turned off by blocking the vehicle
››› page 112 or manually ››› page 131.
Emergency starting function
If no valid key is detected inside the vehicle,
an emergency start-up will be required. The
relevant message will appear in the dash
panel display. This may happen when, for ex-
ample, the battery of the vehicle key button
is very low or flat: ● Immediately after pushing the starter but-
ton, k
eep the vehicle key next to the right
trim of the steering column.
● The ignition connects and the engine starts
autom
atically. Emergency disconnection
If the en
gine does not switch off after briefly
pressing the starter button, an emergency
disconnect will be required:
● Press the starter button twice within 3 sec-
onds
or press it once for more than 1 sec-
ond ››› .
● The engine turns off automatically.
En gine r
estart feature
If no valid key is detected inside the vehicle
after the engine stops, you will only have 5
seconds to restart it. A warning will display
on the dash panel screen.
After this interval, it will not be possible to
start the engine without a valid key inside
the vehicle.
Automatic deactivation of the ignition on ve-
hicles with the Start-Stop system
The ignition is switched off automatically
when the vehicle is stopped and the auto-
matic engine shutdown is active, if:
● The driver's seat belt is not fastened,
● the driver does not step on any pedal,
● the driver door is opened.
Aft
er automatically turning off the ignition, if
the dipped beam is on, the side light re-
mains on for approx. 30 minutes (if the bat-
tery is sufficiently charged). If the driver locks »
167
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
●
Electric
al components with a high power
consumption are switched off temporarily
when the engine starts.
● When starting with a cold engine, noise
lev
els may briefly increase. This is quite nor-
mal, and no cause for concern.
● When the outside temperature is below
+5°C (+41°F), if
the engine is diesel, some
smoke may appear under the vehicle when the fuel-operated auxiliary heater is on. Stopping the engine
3
V
alid for vehicles: with Keyless Access
StepSwitch off the engine with the starter
button ››› page 167.
1.Stop the vehicle completely ››› .
2.Press and hold the brake pedal until the step
4 is performed.
3.If you are driving an automatic vehicle, place
the selector lever in position P.
4.Connect the electronic parking brake
››› page 170.
5.
Briefly press the start-up button ››› Fig. 164.
The START ENGINE STOP button blinks again. If
the engine fails to switch off, perform an emer-
gency disconnect ››› page 167.
6.If the vehicle is equipped with a manual gear-
box, put it into 1st or reverse. WARNING
Never switch off the engine while the vehicle
i s
moving. This could cause loss of control of
the vehicle, accidents and serious injury.
● The airbags and belt tensioners do not
work
when the ignition is switched off.
● The brake servo does not work with the en-
gine off.
Therefore, you need to press the
break pedal harder to brake the vehicle.
● Power steering does not work when the en-
gine is
not running. You need more strength
to steer when the engine is switched off.
● If the ignition is switched off, the steering
co
lumn could be locked, making it impossible
to control the vehicle. CAUTION
If the engine is made to work hard for a long
time, it m
ay overheat after being switched
off. To prevent damage to the engine before
switching it off, leave it idle for approx. 2 mi-
nutes in neutral. Note
After switching off the engine, the cooling fan
m a
y continue to operate in the engine com-
partment for a few more minutes, even with
the ignition off. The radiator fan is automati-
cally switched off. “My Beat” Function
For vehicles with a convenience key there is
the “M
y
Beat” function. This feature provides
an additional indication of the vehicle igni-
tion system.
When accessing the vehicle, e.g. by opening
the doors with the remote control, the START ENGINE STOP button flashes, calling at-
t ention t
o the relevant starter system button.
Upon switching the ignition on/off, the light
of the START ENGINE STOP button flashes. With
the en gine sw
itched off, after a few seconds,
the STOP ENGINE START button stops flashing
and g oe
s out.
With the engine running, the START ENGINE STOP button light stays on, indi-
c atin
g that the engine is running. Upon
switching the ignition off with the START ENGINE STOP button, it starts flashing
ag ain.
In
vehicles with the Start-Stop system , the
“My Beat” function also offers additional in-
formation:
● When the engine stops during the Stop
pha
se, the light of the START ENGINE STOP but-
t on s
tays on, since, even though the engine
is off, the Start-Stop system is active.
● When the engine cannot be stated again
with the
Start-Stop system, ›››
page 188, and
needs to be started manually, the »
169
Technical data
Advice
Operation
Emergencies
Safety