Starting-off and Driving
91
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
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 with an exhaust gas catalytic 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 vehicle is standing. Drive off right away. When driving the engine reaches its operating te
mperature 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 seconds 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 195.
If the engine does not start, contact the nearest specialist garage to obtain profes-
sional 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 tempera- ture. 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 seconds 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 195.
Contact the nearest specialist garage to obtain professional assistance.
Starting the engine after 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 switched off by turnin
g the ignition key from position into
page 89, fig. 94
.
WARNING
Never switch off the engine before the ve
hicle is stationary - risk of accident!
The brake booster only operates when the engine is running. Greater phys-
ical effort for braking is required when en
gine 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 for 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.
A1
s3j8.a.book Page 91 Tuesday, April 20, 2010 1:10 PM
Fuel
164
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 damaged
in the event of an accident and fuel
may leak out.
Caution
Remove any fuel which has spilled onto th
e paintwork of your vehicle immediately
- risk of paint damage!
On vehicles fitted with a catalytic converte
r, never let the fuel tank 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.
Otherwise you are unintentiona
lly filling up the volume,
which in case of heat can caus
e an expansion of the fuel. This can lead to an overflow
of fuel or damage to parts of the fuel reservoir.
The fuel tank is full just as soon as th
e pump nozzle switches off for the first time,
provided the nozzle has been operated prop
erly. Do not continue refuelling - other-
wise the expansion volume is filled up.
Note
The fuel tank has a
capacity of about
45 litres
, containing a reserve of
7litres
.
s3j8.a.book Page 164 Tuesday, April 20, 2010 1:10 PM
Fuses and light bulbs
196
Fuse assignment in the dash panelFig. 162 Schematic representation of the fuse
box for vehicles with left-hand steering / right-
hand steeringCertain electrical components are only standard on certain vehicle model versions or only suppliable as optional
equipment for certain models.
No.
Power consumer
Amperes
1
Not assigned
2
START - STOP
5
3
Instrument cluster, headlamp beam adjustment
7,5
4
ABS control unit
5
5
Petrol engine: Cruise control system
5
6
Reversing light (manual gearbox)
10
7
Ignition
15
Engine control unit, automatic gearbox
7,5
8
Brake pedal switch, coolant fan
5
9
Operating controls for the heating, control unit for air condi- tioning system, parking aid, control unit for cornering lights, coolant fan
5
10
Air conditioning
a)
7,5
11
Mirror adjustment
5
12
Control unit for trailer detection
5
13
Control unit for automatic gearbox
5
14
Motor for halogen projector headlights with cornering light function
10
15
Navigation PDA
5
16
Electrohydraulic power steering
5
17
START - STOP - radio
10
Daylight driving lights
7,5
18
Mirror heater
5
19
S-contact
5
20
Engine control unit
5
Engine control unit
7,5
Fuel pump relay
15
Fuel pump control unit
15
21
Reversing light, fog lights with the function “CORNER”
10
22
Operating controls for the heating, control unit for air condi- tioning system, parking aid, mobi
le phone, instrument cluster,
steering angle sender
, ESP, vehicle voltage control unit, multi-
function stee
ring wheel
7,5
23
Interior lighting, storage compartment and luggage compart- ment, side lights
15
24
Central control unit of the vehicle
5
25
Seat heaters
20
26
Rear window wiper
10
27
Not assigned
28
Petrol engine: AKF valve, petrol engine: Control flap
10
29
Injection, water pump
10
No.
Power consumer
Amperes
s3j8.a.book Page 196 Tuesday, April 20, 2010 1:10 PM
Fuses and light bulbs
197
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
Replacing fuses at the battery (manual gearbox, automatic gearbox DSG)Fig. 163 The battery: Fuse cover
30
Fuel pump
15
Ignition
20
Cruise control system, operation of PTC relay
5
31
Lambda probe
10
32
High pressure pump, pressure valve
15
33
Engine control unit
30/15
34
Engine control unit
15
Vacuum pump
20
35
Power supply of ignition lock
5
36
Main beam light
15
37
Rear fog light
7,5
38
Fog lights
10
39
Blower
30
40
Heatable windscreen washing no
zzles, windscreen cleaning
system
15
41
Not assigned
42
Rear window heater
25
43
Horn
20
44
Front window wiper
20
45
Central control unit fo
r convenience system
25/10
46
Anti-theft alarm system
15
47
Cigarette lighter, power socket in the luggage compartment
b)
15
48
ABS, START-STOP - DC/DC converter ESP
15
49
Turn signal lights, brake lights
15
No.
Power consumer
Amperes
50
START-STOP - DC/DC converter infotainment
30
Radio
10
51
Electrical power window (front and rear) - left side
25
52
Electrical power window (front and rear) - right side
25
53
Parking light - left side
5
Electric sliding/tilting roof
25
54
START-STOP - instrument cluster
5
Anti-theft alarm system
15
55
Control unit for automatic gearbox DSG
30
56
Headlight cleaning system
25
Parking light - right side
5
57
Left low beam, headlight range adjustment
15
58
Low beam on the right
15
a)Only valid for some countries.b)If the engine is switched off already one electr
ical component which is
connected can discharge
the battery.No.
Power consumer
Amperes
s3j8.a.book Page 197 Tuesday, April 20, 2010 1:10 PM