
Air conditioning system
113
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
Note
•
If the auxiliary heating runs, the fuel
consumption comes from
the vehicle tank.
Therefore the auxiliary heating should not be operated, if there is very little fuel in the tank.•
The exhaust pipe of the auxiliary heating,
which is located on the underside of
the vehicle, must not be clogged and the exhaust flow must not be blocked.•
If the auxiliary heating and ventilation is
running, the vehicle battery discharges.
If the auxiliary heating and ventilation
has been operated several times over a
longer period, the vehicle must be driven
a few kilometers in order to recharge the
vehicle battery.•
The auxiliary heating only sw
itches the blower on, if
it has achieved a coolant
temperature of approx. 50 °C.•
At low outside temperatures, this can resu
lt in a formation of water vapour in
the area of the engine compartment.This
is quite normal and is not an operating
problem.•
After switching off the auxiliary heating, the coolant pump runs for a short
period.•
The auxiliary heating and ventilation does not switch on or comes on, if the
vehicle battery indicate
s a low loading state.
•
The auxiliary heating (auxiliary heating) does not switch on, if the following was
shown in the information display or before switching off the ignition:
Please refuel!
(Please refuel!)
.
•
The air inlet in front of the windscreen must be free of ice, snow or leaves in
order to ensure that the auxiliary heating operates properly.•
So that warm air can flow into the vehi
cle interior after switching on the auxil-
iary heating, you must maintain the te
mperature normally selected by you (we
recommend 22°C). It is recommended to
put the air flow
in the position
.
•
On vehicles with DPF (diesel particle filter) the warm coolant heats up the
engine.
Direct switching on/offThe auxiliary heating (auxiliary heating and ve
ntilation) can be switched on or off at
any time
directly
using the button on the op
erating part of the Climatic
⇒ fig. 129
or on the operating part of the Climatronic.
If the auxiliary heating and ventilation is not switched off earlier, it switches off automatically after the expiration of
the set operating period, in the menu
Running
time
.
Fig. 129 Button for direct switching on/off of the auxil-iary heating (auxiliary heating and ventilation) on the operating part of the Climatic
s2dk.1.book Page 113 Wednesday, April 8, 2009 12:23 PM

Starting-off and Driving
119
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
Starting the engineGeneral You can only start the engine only using an original ignition key.•
Place the gearshift lever into neutral (or place the selector lever to the position
P or N in the case of an automatic gearbox)
and put on the handbrake firmly before
starting the engine.•
The clutch pedal should be fully depressed when starting the engine which
means that the starter only
has to crank the engine.
•
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 250.
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.
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 throttl
e and high engine loads as long as the
engine has not yet reached it
s normal operating 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 operate 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 256.
•
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.
A3
s2dk.1.book Page 119 Wednesday, April 8, 2009 12:23 PM

Fuel
221
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
Closing fuel filler cap – Screw on the fuel filler cap by turning it to the right until it is heard to
click.
– Close the fuel filler flap until it locks.The correct grade of fuel for your vehicle as
well as the tyre size and inflation pres-
sures are stated on a sticker affixed to the
inside of the fuel filler flap. Further infor-
mation on fuel
⇒page 219.
The fuel tank has a capacity of about 60 litres.
WARNING
Pay attention to any legal requirements if
you do carry a spare canister in the
vehicle. We do not recommend carrying any fuel canisters in your vehicle for safety reasons. The canister can be da
maged in the event of an accident and
fuel may leak out.
Caution
•
Before refuelling it is necessary to switch off the auxiliary heating system (auxil-
iary heating and ventilation) *.•
Remove any fuel which has spilled onto the paintwork of your vehicle immedi-
ately - risk of paint damage!•
Vehicles fitted with catalytic converter sh
ould never be allowed to let the fuel
tank to run completely empty. An irregular
supply of fuel to the engine can result in
misfiring and unburnt fuel may get into the exhaust system, which may result in overheating and damage to the catalytic converter.•
Make sure that the valve is not pressed into the filler tube when inserting the
pump nozzle into the filler tube. Otherwis
e you are unintentionally filling up the
volume, which in case of heat can cause an
expansion of the fuel. This can lead to
an overflow of fuel or damage
to parts of the fuel reservoir.
•
T h e f u e l t a n k i s f u l l j u s t a s s o o n a s t h
e pump nozzle switches off for the first time,
provided the nozzle has been operated properly. Do not continue refuelling - otherwise the expansion volume is filled up.
s2dk.1.book Page 221 Wednesday, April 8, 2009 12:23 PM

Fuses and light bulbs
258
F12
Lambda probe
10
F13
Control unit for automatic gearbox
15
F14
Not assigned
F15
Coolant pump
10
F16
Not assigned
F17
Instrument cluster, windshield
wiper lever and turn sig-
nal light lever
5
F18
Audio amplifier (sound system)
30
F19
Radio
15
F20
Phone
5
F21
Not assigned
F22
Not assigned
F23
Engine control unit
10
F24
Control unit for CAN databus
5
F25
Not assigned
F26
Not assigned
F27
Valve for fuel dosing
15
F28
Engine control unit
15/25
F29
Main relay
5
F30
Control unit for auxiliary heating
20
F31
Front window wiper
30
F32
Not assigned
F33
Not assigned
F34
Not assigned
F35
Not assigned
No.
Power consumer
Amperes
F36
Not assigned
F37
Not assigned
F38
Radiator fan, valves
10
F39
Not assigned
F40
Not assigned
F41
Not assigned
F42
Not assigned
F43
Ignition
30
F44
Not assigned
F45
Not assigned
F46
Not assigned
F47
Front left main headlight, left rear light unit
30
F48
Pump for ABS
40
F49
Power supply for terminal 15 (ignition on)
50
F50
Not assigned
F51
Not assigned
F52
Power supply relay - terminal X
a)
40
F53
Accessory equipment
50
F54
Not assigned
a)In order not to drain the battery unnecessarily when starting the engine, the electrical com- ponents of this terminal are automatically switched off.No.
Power consumer
Amperes
s2dk.1.book Page 258 Wednesday, April 8, 2009 12:23 PM

Fuses and light bulbs
259
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
Fuse assignment in engine compartment - version 2Certain electrical components are only standard on certain vehicle model versions or only suppliable as optional equipment for certain models.No.
Power consumer
Amperes
F1
Not assigned
F2
Control unit for automatic gearbox DQ200
30
F3
Measuring circuit
5
F4
Va lve s for AB S
30/20
F5
Control unit for automatic gearbox DQ250
15
F6
Instrument cluster, windshield
wiper lever and turn sig-
nal light lever
5
F7
Power supply for terminal 15 (ignition on)
40
F8
Radio
15
F9
Phone
5
F10
Engine control unit, Main relay
5/10
Fig. 231 Schematic repre- sentation of fuse box in engine compartment - version 2
F11
Control unit for auxiliary heating
20
F12
Control unit for CAN databus
5
F13
Engine control unit
15/20/30
F14
Ignition
20
F15
Lambda probe (petrol engine) Glow plug system relay and
fuel pump (diesel engine)
10 5
F16
Front right main headlight, right rear light unit
30
F17
Horn
15
F18
Audio amplifier (sound system)
30
F19
Front window wiper
30
F20
Valve for fuel dosing water pump
2010
F21
Lambda probe
10/15
F22
Not assigned
F23
Relay ValvesHigh pressure pump
51015
F24
Fa n
10
F25
Pump for ABS
30/40
F26
Left main headlight
30
F27
Control unit for glow plug system
50
F28
Windscreen heater
50
F29
Accessory equipment
50
F30
Power supply relay - terminal X
a)
50
a)In order not to drain the battery unnecessarily
when starting the engine, the electrical com-
ponents of this terminal are automatically switched off.No.
Power consumer
Amperes
s2dk.1.book Page 259 Wednesday, April 8, 2009 12:23 PM

Fuses and light bulbs
260
Fuse assignment in the dash panelCertain electrical components are only st
andard on certain vehicle model versions
or only suppliable as optional
equipment for certain models.
No.
Power consumer
Amperes
1
Diagnostic socket, engine control unit, fuel pump relay, fuel pump control unit
7,5
2
Control unit for ABS, ESP, switch for tyre air pressure control, brake sensor
5
3
Switch and control unit for airbag
5
4
WIV, parking light, dimming mirrors, pressure sensor, telephone preinstallation
5
5
Control unit for headlamp beam adjustment and head- light swivel, control unit for parking aid, control unit for park assist
5
6
Instrument cluster, control
unit for electromechanical
power steering, Haldex, selector lever lock, power sup- ply for data bus
5
Fig. 232 Schematic repre- sentation of the fuse carrier in the dash panel
7
Valve heating, air mass meter
10
8
Control unit for trailer detection
5
9
Relay for auxiliary heating
5
10
Adaptive left main headlight
10
11
Adaptive right main headlight
10
12
Central locking of the front doors
10
13
Diagnostic socket, light switch, rain sensor, clock
7,5
14
Central locking system and bonnet lid
15
15
Central control unit - interior lights
7,5
16
Air conditioning system
7,5
17
Central locking system of the rear doors
10
18
Not assigned
19
Not assigned
20
Not assigned
21
Not assigned
22
Air blower for Climatronic
40
23
Front power window
30
24
Selector lever lock
5
25
Rear wind
ow heater
relay for auxiliary heating and ventilation
2530
26
Power socket in the luggage compartment
25
27
Fuel pump relay, Fuel pump relay, control unit for fuel pump, injection valves
1520
28
Not assigned
29
Preparation for the aftermarket radio
5
No.
Power consumer
Amperes
s2dk.1.book Page 260 Wednesday, April 8, 2009 12:23 PM