
Unlocking and locking45
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
Once you unlock the vehicle by inserting the ke
y into the driver door you then have to
insert the key into the ignition lock and switch the ignition on within 15 seconds after
opening the door in order to deactiva te the anti-theft alarm system. The alarm will be
triggered if you do not switch on the ignition within 15 seconds.
When is the alarm triggered?
The following security areas of the locked vehicle are monitored:
Bonnet,
Boot lid,
Doors,
Ignition lock,
Angle of the vehicle* page 45,
Vehicle interior* page 45,
A drop in voltage of the on-board power supply.
An alarm is immediately triggered if either of the two battery terminals is disconnected
while the anti-theft alarm system is activated.
How is the alarm switched off?
You switch the alarm off if you unlock the vehi cle with the radio remote control or if you
switch the ignition on.Note
The working life of the alarm siren is 6 years. More detailed information is available
by a specialist garage.
Before leaving the car, check that all the doors, windows and the electric
sliding/tilting roof* are properly closed in order to ensure that the anti-theft alarm
system is fully operational.
Coding of the radio remote control and th e receiver unit precludes the use of the
radio remote control from other vehicles.
Interior monitor* and Towing protection monitoring*Switch off the interior monitor and towing protection monitoring– Switch off the ignition.
– Open the driver door.
–Press the button
at the centre column on the driver side fig. 32 , the symbol
which lights up in the button changes from red to orange.
– Lock the vehicle within 30 seconds.
The interior monitor and the towing protec tion monitoring are switched on again
automatically the next ti me the car is locked.Note
You can switch the interior monitor and th e towing protection monitoring off if
there is a possibility that movements from (e.g. children or animals) inside the vehicle
interior or if the vehicle must be transported (e.g. by train or ship) or towed, might
trigger the alarm.
The opened storage compartment for spectacles reduces the effectiveness of the
interior monitor. In order to ensure the func tion of the interior monitor to be fully
operational, always close the storage comp artment for spectacles before locking the
vehicle.
Fig. 32 Button for interior monitor and
towing protection monitoring
s43s.1.book Page 45 Thursday, May 13, 2010 1:21 PM

Unlocking and locking
48
Window convenience operationYou can open and close the electrically po wered windows as follows when unlocking
and locking the vehicle (only close the sliding/tilting roof):Opening a window– Hold the key in the locking cylinder of the driver's door in the unlock position or
press the unlock button of the radio remote control until all the windows are
opened.Closing a window– Hold the key in the locking cylinder of the dr iver's door in the lock position or press
the lock button of the radio remote control until all the windows are closed.
You can interrupt the opening or closing operation of the windows immediately by
releasing the key or the lock button.
WARNING
The system is fitted with a force limiter page 47. If there is an obstacle, the
closing process is stopped and the window goes down by several centimeters.
You should then take particular care when closing the windows! You may
otherwise suffer severe injuries as a re sult of getting an arm, for example,
jammed in the window!
Note
On vehicles fitted with an ti-theft alarm system the co nvenience window opening is
possible by means of the key in the locking cylinder only 45 seconds after deactivating
the warning system or after activating the anti-theft alarm system.Operational faultsElectrically operated power windows do not operate
If the battery of the car has been disconne cted and then reconnected, the electrically
operated power windows do not operate. The system must be activated. Proceed as
follows in order to re-establish the function:
Switch on the ignition.
Press the relevant switch top and hold it pressed as lo ng as necessary until the
window is closed.
Release the switch.
Press once again the relevant switch top and hold it pressed for approx. 3 seconds.
Operation in winter
Ice accumulating on the surface of the wi ndows during the winter may result in a
greater resistance when closing the windows and the window may stop and go down
several centimetres
It is necessary to put the force limiter out of operation in order to close the window
page 47, “Force limiter of the power windows”.
WARNING
The system is fitted with a force limiter page 47. If there is an obstacle, the
closing process is stopped and the window goes down by several centimeters.
You should then take particular care when closing the windows! You may
otherwise suffer severe injuries as a re sult of getting an arm, for example,
jammed in the window!Electric sliding/tilting roof*Description
Fig. 35 Control dial for the power
sliding/tilting roof
s43s.1.book Page 48 Thursday, May 13, 2010 1:21 PM

Fuses and light bulbs229
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
Electrically adjustable seats are protected by
automatic circuit breakers, which
switch on again automatically after a few seconds after the overload has been
eliminated.
BulbsChanging bulbsThe relevant lamp must always be switch ed off before a light bulb is replaced.
Defect light bulbs should only be replaced with light bulbs of the same type. The desig-
nation is located on the light socket or the glass bulb.
Changing certain bulbs is not something whic h you can do yourself, but requires to be
done by a specialist. Other parts of the vehi cle must be removed in order to change the
light bulbs. This applies, in particular, to bulbs which can only be reached from the
engine compartment.
13
Diagnostic socket, Light switch
10
14
Control unit for automatic gearbox, Selector lever lock
5
15
Central control unit - interior lights
5
16
Climatronic
10
17
Not assigned
18
Not assigned
19
Control unit for trailer detection
5
20
Not assigned
21
Cornering lights for the left and right side
10
22
Air blower for Climatronic
40
23
Front power window
30
24
Cigarette lighter
25
25
Rear window heater
Rear window heater, Auxiliar y heating (auxiliary heating
and ventilation)
25
30
26
Power socket in the luggage compartment
20
27
Fuel pump relay, Injection valves (diesel engine)
15
28
Not assigned
29
Engine control unit, Crankcase ventilation heater
10
30
Control unit for automatic gearbox
20
31
Vacuum pump
20
32
Rear power window
30
33
Electric sliding/tilting roof
25
34
Control unit for conv enience functions
20
35
Anti-theft alarm system
5
36
Headlight cleaning system
20
No.
Power consumer
Amperes
37
Front seat heating
30
38
Heated rear seats
30
39
Not assigned
40
Air blower for heating and air conditioning
40
41
Rear window wiper
15
42
Not assigned
43
To w i n g d e v i c e
15
44
To w i n g d e v i c e
20
45
To w i n g d e v i c e
15
46
Heated windscreen washer nozzles
5
47
Relay for auxiliary heating
5
48
Not assigned
49
Light switch
5
No.
Power consumer
Amperes
s43s.1.book Page 229 Thursday, May 13, 2010 1:21 PM

Index263
Using the system
Safety
Driving Tips
General Maintenance
Breakdown assistance
Technical Data
Index
AAbroad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
ABS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214
Active driver-steering recommendation . . . . . . . 169
Adjusting seats . . . . . . . . . . . . . . . . . . . . . . . . . . 67, 142 electrically . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Adjusting the steering wheel . . . . . . . . . . . . . . . . . . 107
Air conditioning system . . . . . . . . . . . . . . . . . . . . . . . 97 Air outlet vents . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Recirculated air mode . . . . . . . . . . . . . . . . . . . . 100
Airbag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150 Deployment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
Front airbag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
Head airbag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
Side airbag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Airbag system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150 Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Alternator Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Antilock brake system . . . . . . . . . . . . . . . . . . . . . . . . 171
Antilock brake system (ABS) Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Anti-theft alarm system . . . . . . . . . . . . . . . . . . . . . . . 44
Ashtray . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Auto Check Control . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Auto Computer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Automatic driving lamp control . . . . . . . . . . . . . . . . 52
Automatic gearbox . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Emergency programme . . . . . . . . . . . . . . . . . . . 121
Kickdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Selector lever-emergency unlocking . . . . . . . 121
Tiptronic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
Automatic seat adjustment . . . . . . . . . . . . . . . . . . . . 69
Automatic vehicle wash systems . . . . . . . . . . . . . . 185
Automatic wiper/washer system . . . . . . . . . . . . . . . 61
Avoiding damage to your vehicle . . . . . . . . . . . . . . 180
BBattery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35, 203 change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206
Inspecting the electrolyte level . . . . . . . . . . . . . 205
Operation in winter . . . . . . . . . . . . . . . . . . . . . . . 206
Before setting off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Belt Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Belt tensioners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
Belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
Bonnet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13, 196 Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Boot lid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Brake Handbrake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Brake Assist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
Brake booster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
Brake fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202
Brake pads
Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170
Bulbs Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Button for the central locking system . . . . . . . . . . . 41
Buttons on the driver's door Power windows . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
CCar state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Catalytic converter . . . . . . . . . . . . . . . . . . . . . . . . . . 176
Central locking system . . . . . . . . . . . . . . . . . . . . . . . . . 38lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
unlock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Changing a wheel . . . . . . . . . . . . . . . . . . . . . . . . . . . 217
Changing bulbs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229
Changing the engine oil . . . . . . . . . . . . . . . . . . . . . . 199
Changing wheels around . . . . . . . . . . . . . . . . . . . . 210
Charging the battery . . . . . . . . . . . . . . . . . . . . . . . . . 206 Warning light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Check engine oil level . . . . . . . . . . . . . . . . . . . . . . . 198
Child safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159 Side airbag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
Child safety lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
s43s.1.book Page 263 Thursday, May 13, 2010 1:21 PM