
Air conditioning
Heating and fresh air C ontr
o
ls Fig. 172
Heating controls on the dash panel. Temperature regulator
››
›
page 167.
Blower control. There are four speed set-
tings for the blower. The blower should
always be set at the lowest speed when
driving slowly.
Air distribution regulator.
Heated rear window.
Air distribution
Control 3 for setting the flow of air in the re-
quir ed dir
ection.
– Air distribution towards the windscreen
in order to demist. 1 2
3
– Air di
stribution to upper body.
– Air di
stribution to footwell
– Air distribution to the windscreen and
the footwell. WARNING
● For y
our safety, the windows should never
be fogged up or covered with snow or ice.
This is essential to ensure good visibility.
Please familiarise yourself with the correct
operation of the heating and ventilation sys-
tem, including the demist/defrost functions
for the windows. Note
● Ple a
se consider the general notes
››› page 164. Functions
Ventilating the vehicle interior
The des
ir
ed temperature inside the vehicle
cannot be lower than the ambient tempera-
ture.
● Turn the temperature selector
›› ›
Fig. 172 1 anti-clockwise.
»
167
Technical data
Advice
Operation
Emergencies
Safety

Operation
● Turn b
lo
wer switch 2 to any of the levels
1-4.
● Set the airflow to the desired direction us-
in g air di
s
tribution control 3 .
● Open the relevant air outlets.
Int erior he
atin
g
Maximum heat output, which is needed to
defrost the windows quickly, is only available
when the engine has reached its operating
temperature.
● Turn the temperature selector
›››
Fig. 172 1 clockwise to select the re-
quir ed t
emper
ature.
● Turn blower switch 2 to any of the levels
1-4.
● Set the airflow to the desired direction us-
in g air di
s
tribution control 3 .●
Open the r el
ev
ant air outlets.
Defrosting the windscreen ● Turn the temperature regulator
›››
Fig. 172 1 clockwise to reach the maxi-
mum t emper
at
ure.
● Turn the blower switch 2 to level 4.
● Turn air distribution control to .
● Close the central outlets.
● Open and turn the side outlets towards the
w indo
w
s.
Keeping the windscreen and the side win-
dows demisted
● Turn the temperature regulator
›››
Fig. 172 1 to the heating zone.
●
Turn b
lo
wer switch 2 to any of the levels
2-3.
● Turn air distribution control to .
● Close the central outlets.
● Open and turn the side outlets towards the
w indo
w
s.
Once the windows are demisted and as a pre-
ventive measure, the control 3 can be set in
po s
ition
greater comfort while preventing
the windows from misting again. Note
Remember that the temperature of the engine
coo l
ant should be optimum to ensure that the
heating system functions correctly (except in
vehicles fitted with additional heating*). 168

Air conditioning
Manual air conditioning* C ontr
o
ls Fig. 173
Air conditioning controls on the dash
panel . Temperature selector
››
›
page 169
Blower control. There are four speed set-
tings for the blower. At low speed, it is
recommended to set the blower to a mini-
mum of 1 to improve the intake of fresh
air.
Air distribution regulator.
Air recirculation button ››› page 166.
When the function is activated, a warning
light on the button is turned on.
Heated rear window.
Button to switch on air conditioning
››› page 169. The air conditioning system
1 2
3
only works when the engine is running
and the f
an is
switched on. WARNING
For your safety, the windows should never be
fog g
ed up or covered with snow or ice. This is
essential to ensure good visibility. Please fa-
miliarise yourself with the correct operation
of the heating and ventilation system, includ-
ing the demist/defrost functions for the win-
dows. Note
Please consider the general notes. Functions
Interior heating
Max
imum he
at output, which is needed to
defrost the windows quickly, is only available
when the engine has reached its operating
temperature.
● Turn off the cooling system using the
butt
on ››› Fig. 173 (the button light turns off).
● Turn the temperature regulator 1 to set
the des ir
ed temperature inside the vehicle.
● Turn the blower switch to any of the set-
ting s
1-4. »
169
Technical data
Advice
Operation
Emergencies
Safety

Operation
● Adju s
t
the vents so that the air flow is di-
rected slightly upwards.
Change between degrees Centigrade and de-
grees Fahrenheit
The units of degrees can be changed via the
Easy Connect system using the button
and the f u
nction b
utton SETTINGS >
Units > Temperature .
Automatic mode
Automatic mode is used to maintain a con-
stant temperature and demist the windows
inside the vehicle.
● Set a interior temperature between +16°C
(+64°F) and +29°C (+84°F).
● Adjus
t the vents so that the air flow is di-
rected s
lightly upwards.
● Press the butt
on, AUTO is displayed on
the screen.
Automatic mode is switched off by pressing
the air distribution buttons or increasing or
decreasing the blower speed. However, the
temperature remains regulated.
Adjusting the temperature
● When you switch on the ignition, control 1›››
Fig. 174 can be u sed t
o set the required in-
terior temperature. It is possible to select interior temperatures
from +16°C
(+64°F) t
o +29°C (+84°F). In this
range the temperature is regulated automati-
cally. If a temperature below +16°C (+64°F) is
selected, “LO” is displayed on the screen. If a
temperature above +29°C (+84°F) is selected,
“HI” is displayed on the screen. At both ex-
tremes, Climatronic works at maximum cool-
ing or heating power, respectively. The tem-
perature is not regulated.
In the event of prolonged, irregular distribu-
tion of the air flow from the outlets (particu-
larly the footwells) and significant differen-
ces in temperature, e.g. on leaving the vehi-
cle, sensitive people may catch cold.
Fan regulation
Climatronic automatically regulates blower
speed according to the interior temperature.
It is possible, however, to set the blower
speed to suit requirements.
● Press the 2 buttons to increase or reduce
f an s
peed.
C
limatronic will switch off when the blower
switches off.
Turn on windscreen defrost
● Press the button ›››
Fig. 174. Switching off windscreen defrosting
●
Press the button sev
eral times or
press the button.
The temperature is regulated automatically.
The air output from the vents ››› Fig. 171 2 is increased.
WARNING
Read and observe the safety warnings ›››
in
Genera l
notes on page 164. Note
● A v i
sit to the specialised service once a
year is recommended to clean the Climatronic
system.
● The interior temperature sensor is at the
bottom. Do not c
over it with stickers or the
like, as this could have a negative effect on
Climatronic operations. 172

Operation
If the engine does not start immediately,
sw it
c
h the starter off after 10 seconds and try
again after half a minute. If the engine still
does not start, the fuel pump fuse should be
checked ››› page 104, Fuses. WARNING
● Never s t
art or run the engine in unventila-
ted or closed rooms. The exhaust gases con-
tain carbon monoxide, an odourless and col-
ourless poisonous gas. Risk of fatal acci-
dents. Carbon monoxide can cause loss of
consciousness and result in death.
● Never leave the vehicle unattended if the
engine is
running.
● Never use “cold start sprays”, they could
explode or c
ause the engine to run at high
revs. Risk of injury. CAUTION
● When the engine i s
cold, you should avoid
high engine speeds, driving at full throttle
and over-loading the engine. Risk of engine
damage.
● The vehicle should not be pushed or towed
more than 50 metr
es to start the engine. Un-
burnt fuel could enter the catalytic converter
and damage it.
● Before attempting to push-start or tow a ve-
hicle in or
der to start it, you should first try to
start it using the battery of another vehicle.
Please observe and follow the notes on the
››› page 71, How to jump start. For the sake of the environment
Do not warm-up the engine by running the
engine w ith the
vehicle stationary. Start off
immediately, driving gently. This helps the
engine reach operating temperature faster
and reduces emissions. Starting diesel engines
The engine can only be started using a genu-
ine S
EA
T key with its correct code.
– Move the gearbox lever to the neutral posi-
tion and depre s
s the clutch pedal thor-
oughly and hold it in this position for the
starter to turn the engine on.
– Turn the ignition key to position ›››
Fig. 175
2 . The warning lamp
wi
l l light for en-
gine pre-heating.
– When the lamp turns off, turn the ignition
key t
o position 3 to start the engine. Do
not pr
e
ss the accelerator.
– Release the ignition key as soon as the en-
gine star
ts. The starter motor should not
turn at the same time.
When starting a cold engine, it may be a little
noisy for the first few seconds until oil pres-
sure has built up in the hydraulic valve com-
pensators. This is quite normal, and no cause
for concern. If there are problems starting the engine, see
the
›››
page 71.
Glow plug system for diesel engines
To avoid unnecessary discharging of the bat-
tery, do not use any other major electrical
equipment while the glow plugs are pre-heat-
ing.
Start the engine as soon as the glow plug
warning lamp goes out.
Starting a diesel engine after the fuel tank
has run dry
If the fuel tank has been completely run dry,
it may take longer than normal (up to one mi-
nute) to start a diesel engine after refuelling.
This is because the fuel system must elimi-
nate air first. WARNING
Observe the safety warnings ›››
in Starting
petro l
engines on page 174. CAUTION
● When the engine i s
cold, you should avoid
high engine speeds, driving at full throttle
and over-loading the engine. Risk of engine
damage.
● The vehicle should not be pushed or towed
more than 50 metr
es to start the engine. Un-
burnt fuel could enter the particulate filter
and damage it. 174

Driving
● the driv er door i
s
opened.
After 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
the vehicle or manually turns off the light, the
side light goes out. WARNING
Any accidental movement of the vehicle could
re s
ult in serious injury.
● When switching on the ignition, do not
pre
ss the brake or clutch pedal, otherwise
the engine could start immediately. WARNING
If vehicle keys are used negligently or with-
out due c ar
e, this may cause accidents and
serious injury.
● Never leave any key inside the vehicle
when exitin
g. 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 or
e 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 v
ehicle 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 st
arting if it requires preheating.
● If during the STOP phase you press the
STAR
T ENGINE STOP button, the ignition is
swit c
hed off and the button flashes.
● If the indication “Start-Stop system deacti-
vated:
Start the engine manually” is dis-
played on the dash panel display, the START ENGINE STOP button will blink.
Starting the engine
3 V
alid for vehicles: with starter button
StepStarting the engine with the starter
button ››› page 176.
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 selec-
tor lever in position P or N.
StepStarting the engine with the starter
button ››› page 176.
3.
Briefly press the starter button ››› Fig. 176
without pressing the accelerator. For the en-
gine 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 nec-
essary, perform an emergency start
››› page 176.
5.Disconnect the hand brake when you are
about to start driving ››› page 180. WARNING
Never leave the vehicle with the engine run-
ning, e s
pecially 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
sud den inc
rease in the engine speed.
● Never use sprays to cold start the engine. CAUTION
● The st ar
ter motor or the engine may be
damaged if you try to start the engine while » 177
Technical data
Advice
Operation
Emergencies
Safety

Operation
the
button and the
S
ET
TINGS and
E SC
System function buttons.
WARNING
You should switch on the ESC Sport mode on-
ly if the tr
affic conditions and your driving
ability allow you to do so safely: risk of skid-
ding!
● With ESC in Sport mode, the stabilising
function w
ill be limited to allow for a sportier
drive. The driving wheels could spin and the
vehicle could skid. Note
If the ASR is disconnected or the ESC’s Sport
mode is sel
ected, cruise control* will be
switched off. Electronic differential lock (EDS)*
The EDL operates along with the ABS in vehi-
c
l
e
s equipped with Electronic Stability Con-
trol (ESC)*.
EDL helps the vehicle to start moving, accel-
erate and climb a gradient in slippery condi-
tions where this may otherwise be difficult or
even impossible.
It uses the ABS sensors to monitor the speed
of the driven wheels.
At speeds of up to approximately 80 km/h
(50 mph), it is able to balance out differences in the speed of the driven wheels of approxi-
mately
100 rpm/min caused by a partially
slippery road surface. It does this by braking
the wheel which has lost traction and distrib-
uting more driving force to the other driven
wheel via the differential.
To prevent the disc brake of the braking
wheel from overheating, the EDL cuts out au-
tomatically if subjected to excessive loads.
The vehicle will continue to function normally
without EDL. For this reason, the driver is not
informed that the EDL has been switched off.
The EDL will switch on again automatically
when the brake has cooled down.
Control lamp
A malfunction in the EDL is indicated by the
ESC control lamp . Take the vehicle to a
specialised workshop as soon as possible. WARNING
● When acc el
erating on a slippery surface,
for example on ice and snow, press the accel-
erator carefully. Despite EDL, the driven
wheels may start to spin. This could impair
the vehicle's stability.
● Always adapt your driving style to suit road
conditions
and the traffic situation. Do not let
the extra safety afforded by EDL tempt you in-
to taking any risks when driving, this can
cause accidents. CAUTION
Modifications to the vehicle (e.g. to the en-
gine, the brak e sy
stem, running gear or any
components affecting the wheels and tyres)
could affect the efficiency of the EDL
››› page 259. Hydraulic Brake Assist (HBA)*
The function (Hydraulic Brake Assist HBA) is
only
inc
luded in vehicles with ESC.
In an emergency, most drivers brake in time,
but not with maximum force. This results in
unnecessarily long braking distances.
This is when the brake assist system comes
into action. When pressing the brake pedal
rapidly, the assistant interprets it as an emer-
gency. It very quickly builds up the full brake
pressure so that the ABS can be activated
more quickly and efficiently, thus reducing
braking distance.
Do not reduce the pressure on the brake ped-
al, since the brake assist system switches off
automatically as soon as you release the
brake.
Automatic hazard warning lights activation
The brake lights flash automatically to indi-
cate that the vehicle is braking suddenly or in
an emergency situation. If the emergency
braking continues until the vehicle comes to
184

Operation
WARNING
Observe the safety warnings ››› in Selector
lev er po
sitions on page 189.
● Never allow the brake to rub and do not use
the brake ped
al too often or for long periods.
Constant braking causes overheating in the
brakes. This could significantly reduce brak-
ing power, increase braking distance or even
result in the total failure of the brake system.
● To avoid rolling back on gradients always
hold the
vehicle with the footbrake or hand-
brake if you have to stop. CAUTION
● If y
ou stop the vehicle on a gradient, do not
attempt to stop it from rolling by depressing
the accelerator when a gear has been selec-
ted. This could cause overheating and dam-
age the automatic gearbox. Apply the hand-
brake firmly or press the brake pedal in order
to prevent the vehicle from rolling back.
● If you allow the car to roll with the selector
lever in po
sition N with the engine switched
off, the automatic gearbox will be damaged
as it will not be lubricated.
● In certain driving situations or traffic condi-
tions, suc
h as frequently starting, prolonged
“creeping” of the vehicle or traffic jams with
continuous stoppages, the gearbox could overheat causing damage! If the warning
lamp
lights up, stop the vehicle as soon as
possible and wait for the gearbox to cool
››› page 194. Kick-down feature
The kick-down feature allows maximum ac-
cel
er
ation to be reached.
When the accelerator pedal is pressed right
down past the point of resistance at full throt-
tle, the gearbox will shift down to a lower
gear, depending on road speed and engine
speed. The upshift to the next higher gear is
delayed until the engine reaches maximum
rpm. WARNING
Please note that if the road surface is slip-
pery or w
et, the kick-down feature could
cause the driving wheels to spin, which could
result in skidding. Launch control program
3 Valid for vehicles: with Launch-Control/6-Speed
D SG w
ith diesel engines superior to 125 kW and pet-
rol engines superior to 140 kW.
The Launch control programme enables maxi-
mum acceleration.
Important: the engine must have reached op-
erating temperature and the steering wheel
must not be turned.
The engine speed for launch-control is differ-
ent on petrol and diesel engines. To use the
launch-control you must disconnect the anti-
slip regulation (ASR) through the Easy Con-
nect system menu ›››
page 122. The warning
lamp will stay switched on or will flash
slowly depending on whether or not the vehi-
cle has a driver information system*.
On vehicles with the driver information sys-
tem, the ESC lamp lights up permanently and
the corresponding text message Stability
control deactivated (temporary) ap-
pears on the instrument panel to indicate the
deactivation status.
– When the engine is running, switch off the
traction c ontr
ol (ASR)1)
. 1)
Vehicles without driver information system: the
warnin g l
amp flashes slowly/Vehicles with driver in-
formation system: the warning lamp stays on.
192