Heating and air conditioning system
86
The air conditioning only operates if button
⇒fig. 101
is pressed and the
following conditions are met:•
engine running,
•
outside temperature above +5 °C and
•
blower switch switched
on (positions 1 to 4).
If the cooling system is switched on, the temperature and air humidity drops in the vehicle. The wellbeing of the occupants of
the car is enhanced as a result of this
particularly at high outside temperatures and a high air humidity. The system prevents the windows misting up during the cold season of the year. The heating effect is dependent upon th
e coolant temperature, thus full heat
output only occurs when the engine
has reached its operating temperature.
It is possible to briefly activate recirc
ulated air mode in order to enhance the
cooling effect
⇒
.
Air at a temperature of about 5°C may flow
out of the vents under certain circum-
stances when the cooling system is operating. Lengthy and uneven distribution of the air flow out of the vents (in particular at the leg area) and large differences in temperature, for example when getting out of
the vehicle, can result in chills in
sensitive persons. The air inlet in front of the windscreen must be free of ice, snow or leaves in order to ensure that the heating and cooling systems operate properly. After switching on the cooling
Condensation
from the evaporator of the air condi-
tioning may drip down and form a puddle
below the vehicle. This is quite normal
and not an indication of a leak!
WARNING
•
For your own safety and that of other road users, ensure that all the
windows are free of ice, snow and mistin
g. Please familiarize yourself about
how to correctly operate th
e heating and ventilation systems, how to demist
and defrost the windows, as well as with the cooling mode.•
You should not leave recirculated air mode on over a longer period of
time, as “stale” air may result in fatigue in the driver and occupants, divert your attention and also cause the windows to mist up. The risk of having an
accident increases. Switch recirculated air mode off as soon as the windows begin misting up.
Note
•
We recommend that you do not smoke in the vehicle when the recirculating air
mode is operating since the smoke which is drawn at the evaporator from the inte- rior of the vehicle forms deposits in the
evaporator of the air conditioning system.
This produces a permanent odour when th
e air conditioning system is operating
which can only be eliminated through co
nsiderable effort and expense (replace-
ment of compressor).Using the systemSetting temperature – Turn the control dial
⇒
fig. 101
to the right in order to increase the
temperature.
– Turn the control dial to the left in order to increase the tempera-
ture.
AC
AD
WARNING (continued)
Fig. 101 The air conditioning system: Control elements
AAAA
s2g8.b.book Page 86 Tuesday, April 7, 2009 8:53 AM
Heating and air conditioning system
89
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
Climatronic* (automatic air conditioning)Description The Climatronic system is a combin
ation of an automatic heating,
fresh air and cooling system which provides optimal comfort for the occupants of the car.The Climatronic maintains a constant temp
erature fully automatically, once it has
been set. This is achiev
ed by automatically varying the temperature of the
outflowing air, the blower stages and the ai
r distribution. The system also takes into
account bright sunlight which eliminates
the need to alter the settings manually.
The
automatic mode
⇒page 90 ensures maximum wellbeing of the occupants at
all times of the year. Description of Climatronic system The cooling operates only if the following conditions are met:•
engine running,
•
outside temperature above +5 °C,
•
the button is
not
pressed.
If the cooling system is switched on, the temperature and air humidity drops in the vehicle. The wellbeing of the occupants of
the car is enhanced as a result of this
particularly at high outs
ide temperatures and a high air humidity. The system
prevents the windows misting up during the cold season of the year. The heating effect is dependent upon th
e coolant temperature, thus full heat
output only occurs when the engine has reached its operating temperature. It is possible to briefly activate recirc
ulated air mode in order to enhance the
cooling effect
⇒
.
The air inlet in front of the windscreen must be free of ice, snow or leaves in order to ensure that the heating and cooling systems operate properly. The AC compressor is switched off at a hi
gh coolant temperature in order to provide
cooling at a high load of the engine.
After switching on the cooling
Condensation
from the evaporator of the air condi-
tioning may drip down and form a puddle be
low the vehicle. This is quite normal
and not an indication of a leak! If you make a change before switching off
the ignition, which differs from the auto-
matic mode, the changed functions remain
stored. Only the function “circulating
air” is erased 20 minutes after switching off the ignition. Recommended setting for all periods of the year:•
Set the temperature to 22 °C (72 °F).
•
Press the button
⇒page 90, fig. 102
.
•
Move the air outlet vents
3 and
4, s o t h a t th e a i r f l o w i s d i re c t e d s l i g h tl y u pw a rd s
⇒ page 83, fig. 99
.
Switching over between degrees
Celsius and degrees Fahrenheit
Press and hold the buttons
17 and
9
⇒page 90, fig. 102
. The infor-
mation in the desired temperature measuring unit appears in the display.
WARNING
•
For your own safety and that of other road users, ensure that all the
windows are free of ice, snow and mistin
g. Please familiarize yourself about
how to correctly operate th
e heating and ventilation systems, how to demist
and defrost the windows, as well as with the cooling mode.•
You should not leave recirculated air mode on over a longer period of
time, as “stale” air may result in fatigue in the driver and occupants, divert your attention and also cause the windows to mist up. The risk of having an accident increases. Switch recirculated air mode off as soon as the windows begin misting up.
Note
•
If the cooling system has not been switched on for a lengthy period, odours may
be produced at the evaporator because of
deposits. Switch the cooling system on
at least once a month for approximately 5 mi
nutes at the highest blower stage - also
during the cold season of the year - in
order to remove such odours. Also open a
window for a short time.
ECON
AUTO
ECON
AUTO
s2g8.b.book Page 89 Tuesday, April 7, 2009 8:53 AM
Heating and air conditioning system
92
Note
If the windscreen mists up, press the button
⇒page 90, fig. 102
. After the
windscreen has been demisted, press the button .Setting temperatureYou can set the interior temperature randomly with the buttons and
.
You can set the interior temperature between +18°C (64°F) and +29°C (84 °F). The interior temperature is regulated automatica
lly within this range. If you select the
temperature below +18°C (64 °F), “LO” appe
ars in the display. If you select the
temperature higher than +29°C (84 °F), “H
I” appears in the display. In both limit
positions the Climatronic operates at
maximum cooling or heating capacity,
respectively. The temperature is not controlled in this case. Lengthy and uneven distribution of the air flow out of the vents (in particular at the leg area) and large differences in temperature, for example when getting out of the vehicle, can result in chills in sensitive persons.Controlling blower There are a total of six blower stages available.The Climatronic system controls the bl
ower stages automatically in line
with the interior temperature. You
can also, however, adapt the blower
stages manually to suit
your particular needs.
– Press the button or
⇒
page 90, fig. 102
in order to decrease or
increase the speed.
If you switch off the blowers, th
e Climatronic is switched off and
OFF
is shown in
the display. The set blower speed is indicated by the lighting up of the respective number of bars at the point .
WARNING
•
“Stale air” may result in fatigue in
the driver and occupants, reduce
attention levels and also cause the windows to mist up. The risk of having an accident increases.•
Do not switch the Climatronic syst
em off for longer than necessary.
•
Switch the Climatronic system on as soon as the windows mist up.
Operational problemsIf all the symbols on the display of the au
tomatic air conditioning system flash for
approx. 15 seconds after switching on the ignition, then there is a fault in the system - visit a specialist garage. If the cooling system does not oper
ate, the following faults may exist:
•
the outside temperature is lower than +5°C,
•
The compressor of the automatic air
conditioning system was temporarily
switched off due to a too high temperature of the coolant,•
a blown fuse.
Check the fuse, replace it if necessary
⇒page 192. If a blown fuse is not the source
of the fault, switch the Climatronic off and have it checked. If the cooling capacity decreases, switch
the Climatronic off and have it checked.
A1AUTO
A15
A16
A11
A12
A2
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Starting-off and Driving
95
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
•
Let go of the key as soon as the engine starts otherwise there may be damage
to the starter. The engine running noises may louder at
first be louder for
a short time after
starting the cold engine until oil pressure
can be built up in the hydraulic valve
clearance compensation. This is quite normal and is not an operating problem. If the engine does not start ... You can use the battery of anothe
r vehicle as a jump-start aid
⇒page 188.
It is only possible to tow-start vehicl
es fitted with a manual gearbox. The tow-
starting distance must not be more than 50 metres
⇒page 191.
WARNING
•
Never run the engine in non ventilat
ed or enclosed areas. The exhaust
gases of the engine contain besides
the odorless and colourless carbon
monoxide a poisonous gas - hazard! Carbon monoxide can cause uncon- sciousness and death.•
Never leave your vehicle unattended with the engine running.Caution
•
The starter may only be operated (ignition key position ), if the engine is not
running. If the starter is immediately oper
ated after switching off the engine, the
starter or the engine can be damaged.•
Avoid high engine revolutions, full throttle and high engine loads as long as the
engine has not yet reached its normal oper
ating temperature - risk of damaging the
engine!•
Vehicles which are fitted wi
th an exhaust gas catalyti
c converter should not be
tow-started over a distance of more than 50 metres.
For the sake of the environment
Never warm up the engine when the vehi
cle is standing. Drive off right away.
Through this the engine reaches its operating temperature more rapidly and the pollutant emissions are lower.
Petrol enginesThese engines are fitted with a starter system which selects the correct fuel-air mixture for every external air temperature.•
Do
not depress
accelerator before and when starting engine.
•
Interrupt the attempt at starting after
10 seconds if the engine does not start
right awayand wait for about 30 se
conds before repeating the attempt.
•
It is possible that the fuse on the electric
al fuel pump is defect if the engine still
does not start. Check the fuse and replace it if necessary
⇒page 192.
•
Contact the nearest specialist garage to obtain professional assistance.
It may be necessary, if the engine is
very hot
, to slightly depress the accelerator
after the engine has started.Diesel enginesGlow plug system Diesel engines are equipped with a glow
plug system, the preglow period being
controlled automatically in
line with the coolant temperature and outside temper-
ature. The preglow indicator light
comes on after the ignition has been switched on.
You should not switch on any major electrical components during the heating period otherwise the vehicle battery will be drained unnecessarily.•
You should start the engine immediately after the glow plug warning light
has gone out.•
The glow plug warning light will come on for about one second if the engine is
at a normal operating temperature or if the outside temperature is above +5°C. This means that you can start the engine
right away
.
•
Interrupt the attempt at starting after
10 seconds if the engine does not start
right awayand wait for about 30 se
conds before repeating the attempt.
•
It is possible that the fuse on the diesel preglow system is defect if the engine
still does not start. Check the fuse and replace it if necessary
⇒page 192.
•
Contact the nearest specialist garage to obtain professional assistance.
A3
s2g8.b.book Page 95 Tuesday, April 7, 2009 8:53 AM
Starting-off and Driving
96
Starting the engine after the fuel tank has run dry It may take longer than normal to start the
engine after refuelling
if the fuel tank has
run completely dry - up to one minute. This is because the fuel system must first of all be filled while the attempting to start the engine.Switching off the engine– The engine can be swit
ched off by turning the ignition key from posi-
tion into
⇒
page 94, fig. 105
.
WARNING
•
Never switch off the engine before the
vehicle is stationary - risk of acci-
dent!•
The brake booster only operates when the engine is running. Greater
physical effort for braking is required
when engine is switched off. Because
if you do not stop as normal, this can cause an accident and severe injuries.
Caution
you should not switch the engine off right
away at the end of your journey after the
engine has been operated fo
r a lengthy period at high
loads but should be allowed
it to run at idling speed for about 2 minutes
. This prevents any accumulation of heat
when the engine is switched off.
Note
•
The radiator fan may continue running fo
r a further 10 minutes or so after the
engine and the ignition have been switched
off. The coolant fan may, however, also
switch on again after some time if the coolant temperature rises because of an accumulation of heat in the engine or
if the engine is warm and the engine
compartment is additionally
heated by strong sunlight.
•
This is why particular care is required when carrying out any work in the engine
compartment
⇒page 160, “Working in the engine compartment”.
ShiftingShift into reverse only when the vehicle is
stationary. Depress the clutch pedal and
hold it fully depressed. Wa
it a moment before engaging reverse gear in order to
avoid any shift noises. The reversing lights will come on once reverse gear is engaged, provided the igni- tion is on.
WARNING
Never engage the reverse gear when driving - risk of accident!
Note
•
One should not lay the hand on the shift lever while driving the vehicle. The
pressure of the hand will be transferred to
the gearshift forks in the gearbox. This
can, over a period of time, lead to
early wear of the gearshift forks.
•
Depress the clutch pedal fully when chan
ging gears, in order to avoid unneces-
sary wear and damage.
A1
Fig. 106 Shift pattern on models fitted with 5-speed manual gearbox
s2g8.b.book Page 96 Tuesday, April 7, 2009 8:53 AM
Towing a trailer
145
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
should be attached to folding arms. Adjust
the mirrors so that they provide you with
an adequate field of view to the rear. Headlights Before starting off with a hitched trailer, also check the setting of the headlights. Alter the setting as necessary with th
e aid of the headlight beam adjuster
⇒ page 51. Detachable ball head The ball rod is detachable on vehicles which feature a factory-fitted towing device. It is stowed together with separate fitting instructions in the spare wheel well in the luggage compartment of the vehicle. Further information on the towing device
⇒page 146.
Note
•
We recommend that you also have yo
ur vehicle inspected between service
intervals if you tow a trailer frequently.•
The handbrake on the towing vehicle
must be put on when coupling and
decoupling the trailer.Driving Tips Particular caution is required when towing a trailer.– Do not, as far as possible, drive
with your vehicle unladen and the
trailer laden.
– Do not make full use of the legal maximum speeds. This applies in
particular to downhill sections.
– Apply the brakes in good time.– Keep a check on the coolant temper
ature gauge if the outside temper-
ature is high.
Distribution of weight The distribution of the weight is very poor
if your vehicle is
unladen and the trailer
is laden. Maintain a particularly low speed if you cannot avoid driving with this combination. Driving speed Do not drive faster than 80 km/hour for safety reasons. This also applies for coun- tries in which higher speeds are allowed. The fact that the driving stability of the vehicle + trailer combination reduces with increasing speed means that the legally allowed speed should not be used when there are unfavourable road, weather or wind
conditions, particul
arly near accident
black spots. You must always reduce your speed immedi
ately as soon as you detect even just
the
slightest swaying
of the trailer. On no account attempt to stop the trailer from
“swaying” by
accelerating.
Apply the brakes in good time! If the trailer is fitted with a
trailer brake
, apply the
brakes gently at first and then brake firmly
. This will avoid brake jolts resulting from
the trailer wheels locking. Shift down gears
in good time before negotiating a down-
hill section to allow the engine to also act as a brake. Engine overheating Please keep a check on the coolant temperature gauge if you have to negotiate a lengthy slope in a low gear at a high engine speed when the outside temperature is very high
⇒page 16.
If the needle of the coolant temperature gauge moves into the right-hand area or even the red area of the scale, reduce yo
ur speed immediately. Stop and switch off
the engine if the warning light
in the instrument cluste
r begins flashing. Wait a
few minutes and check the level of coolant in the coolant expansion bottle ⇒ page 165, “Inspecting the coolant level”. Please refer to the following guidelines
⇒page 30, “Coolant temperature/ Coolant
quantity
”.
The coolant temperature can be reduced by switching on the heating.Any increase in the cooling effect of the coolant fan through shifting down a gear and increasing the engine speed is not possible since the fan speed is independent
s2g8.b.book Page 145 Tuesday, April 7, 2009 8:53 AM
Inspecting and replenishing
160
– Take the bonnet support out of its holder and set it in the opening
designed for it
⇒
page 159, fig. 150
.
Closing the bonnet – Lift the bonnet slightly and unhook the bonnet support. Press the
bonnet support into the hold
er designed to hold it.
– Allow the bonnet to drop from a height of about 30 cm into the lock -
bonnet
do not press down on it
!
WARNING
•
Never open the bonnet if you see that steam or coolant is flowing out of
the engine compartment - risk of scaldi
ng! Wait long enough until the steam
or coolant has stopped escaping.•
For safety reasons, the bonnet must always be properly closed when
driving. One should therefore check that
the lock has in fact engaged prop-
erly after closing the bonnet.•
Stop your vehicle i
mmediately while driving if yo
u notice that the lock is
not properly engaged and close the bonn
et properly - risk of an accident!
Working in the engine compartment Particular care is required when ca
rrying out any work in the engine
compartment!There is a risk of injuries, scalding,
accidents and fire wh
en working in the
engine compartment, e.g. inspecting an
d replenishing oil and other fluids. For
this reason, it is essential to comply with the warning instructions stated below and with the general applicable
rules of safety. The engine compart-
ment of your car is a hazardous area
⇒
.
WARNING
•
Never open the bonnet if you see that steam or coolant is flowing out of
the engine compartment - risk of scaldi
ng! Wait long enough until the steam
or coolant has stopped escaping.•
Switch off the engine and pull out the ignition key.
•
Apply the handbrake firmly.
•
On vehicles fitted with a manual gearbox, move the gearshift lever into
Neutral.•
Allow the engine to cool down.
•
Keep children clear of the engine compartment.
•
Never spill oil and other fluids over the hot engine. Such fluids (e.g. the
antifreeze contained in the coolant) may ignite!•
Avoid short circuits in the electrical system - particularly on the battery.
•
Never place your hand into the radiator
fan as long as the engine is still
warm. The fan might suddenly start running!•
Never open the cap of the coolant expa
nsion bottle as long as the engine
is still warm. The cooling system is pressurized!•
Cover over the cap of the coolant expansion reservoir with a large cloth
when opening it as protection for your face, hands and arms from hot steam or hot coolant.•
Do not let objects, such as e.g cleaning cloth or tools lie in the engine
compartment.•
If you wish to work under the vehicl
e, you must secure the vehicle from
rolling away and support it
with suitable supporting blocks; the lifting jack*
is not sufficient for this - risk of injury!•
In cases where it be necessary to carry out inspection work when the
engine is running there is an additional risk from rotating parts (e.g. the V- ribbed belt, alternator, radiator fan) and from the high-voltage ignition system. Please observe in addition the following:
− Never touch the electrical cabl
es of the ignition system.
− Absolutely avoid any jewellery, loose items of clothing or long hair from getting into the rotating part
s of the engine - Hazard! Therefore
s2g8.b.book Page 160 Tuesday, April 7, 2009 8:53 AM
Inspecting and replenishing
161
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
remove any jewellery beforehand, tie up your hair and wear tight fitting clothing.
•
Please also comply with the warnin
g instructions stated below when
carrying out any essential work on the
fuel system or on
the electrical
system:
− Always separate the car batter
y from the electrical system.
− Do not smoke. − Never carry out any work close to naked flames. − Always keep a working fire extinguisher at hand.Caution
When replenishing fluids in the engine, al
ways ensure that the fluids are on no
account mixed up. This may result in ma
jor operating problems and also vehicle
damage!
Overview of the engine compartment The main inspection points.Fig. 151 1.6 ltr./75 kW petrol engine1.6 ltr./75 kW petrol engine
⇒fig. 151
Coolant expansion bottle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reservoir for hydraulic liquid of power steering Windshield washer fluid reservoir . . . . . . . . . . . . . . . . . . . . . . . . . . . Engine oil dipstick . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Engine oil filler opening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Brake fluid reservoir . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Battery (below a cover) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Note
The location of the inspection points in
the engine compartment of petrol and
diesel engines is practically identical.
WARNING (continued)
A1
165
A2A3
172
A4
163
A5
163
A6
167
A7
168
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