2001 MERCEDES-BENZ C320 alarm

35 Central locking system
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Trunk
The lock is located next to the recessed handle.
When the trunk is separately locked, it remains locked
when centrally unlocking the vehicle.
To deny any unauthorized person access to the trunk,
lock it separately with the mechanical key. Leave only
the electronic main key less its mechanical key with the
vehicle.
Notes:
In case of a malfunction in the central locking system
the trunk can be unlocked individually.
To unlock and open the trunk lid, turn mechanical key
to position 2, hold and push to open.
The mechanical key does not operate the central locking
system or antitheft alarm system.
When unlocking the trunk with the mechanical key, the
exterior lamps will flash and the alarm will sound.
To cancel the alarm, insert the electronic key in the
starter switch or press buttonŒ or‹ on the
electronic main key.
If the fuel filler flap cannot be opened, see page 335.0Neutral position
1Separate locking of trunk – remove mechanical key
in this position.
2Unlocking
Important!
Do not p lac e m echan ical key in sid e tr un k , s in ce tr unk is
locked again when closing the lid if the vehicle has been
previously centrally locked.

38 Antitheft alarm system
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Antitheft alarm system
1Indicator lamp in switch located in center console
The antitheft alarm is automatically armed or disarmed
with the remote control by locking or unlocking the
vehicle.
The antitheft alarm is armed within approximately
10 seconds after locking the vehicle.
A blinking lamp (1) indicates that the alarm is armed.Operation:
Once the alarm system has been armed, the exterior
vehicle lamps will flash and an alarm will sound when
someone:
•opens a door,
•opens the trunk,
•opens the hood,
•attempts to raise the vehicle.
The alarm will last approximately 3 minutes in form of
flashing exterior lamps. At the same time an alarm will
sound for 30 seconds. The alarm will stay on even if the
activating element (a door, for example) is immediately
closed. If the alarm stays on for more than 20 seconds,
an emergency call is initiated automatically. See Tele
Aid on page 220.
Notes:
When you unlock the driver’s door with the mechanical
key, the exterior lamps will flash and the alarm will
sound.

39 Tow-away alarm
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index To cancel the alarm, insert the electronic key in the
starter switch or press buttonŒ or‹ on the
electronic main key.Tow - away a l a r m
The switch is located in the center console.
1Press to switch off tow-away alarm
2Indicator lamp
Once the alarm system has been armed, the exterior
vehicle lamps will flash and an alarm will sound when
someone attempts to raise the vehicle.
2

40 Tow-away alarm
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The alarm will last approximately 3 minutes in form of
flashing exterior lamps. At the same time an alarm will
sound for 30 seconds. The alarm will stay on even if the
vehicle is immediately lowered. To cancel the alarm,
insert the electronic key in the starter switch or press
buttonŒ or‹ on the electronic main key.
If the alarm stays on for more than 20 seconds, an
emergency call is initiated automatically. See Tele Aid
on page 220.
To prevent tri gger ing t he tow -away alarm featur e, s witch
off the tow-away alarm before towing the vehicle, or
when parking on a surface subject to movement, such
as a ferry or auto train.To do so, turn electronic key in starter switch to
position 1 or 0, or remove electronic key from starter
switch. Press tow-away alarm switch (1). The indicator
lamp (2) illuminates briefly.
Exit vehicle, and lock vehicle with the electronic main
key.
The tow-away alarm remains switched off until the
vehicle is locked again with the electronic main key, at
which time it is automatically reactivated.

220 Tele Aid
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Tele Aid
Important!
The initial activation of the Tele Aid system may only be
performed by completing the subscriber agreement and
placing an acquaintance call using the “SOS” button.
Failure to complete either of these steps will result in a
system that is not activated.
If you have any questions regarding activation, please
call the Response Center at 1-800-756-9018 (in the USA)
or 1-888-923-8367 (in Canada).
(Te l ematic Alarm Identification on Demand)
The Tele Aid system consists of three types of response;
automatic and manual emergency, roadside assistance
and information.
The Tele Aid system is always operational, providing
that the vehicle’s battery is charged and properly
connected. To activate, press the “SOS” button, the
Roadside Assistance button or the Information
button¡, depending on the type of response
required.System self-check
Initially, after turning the electronic key in starter
switch to position 2, malfunctions are detected and
indicated (the indicator lamps in the “SOS” button, the
Roadside Assistance button and the Information
button¡ stay on longer than 5 seconds or do not
come on).
If a malfunction is indicated as outlined above, have the
system checked at the nearest Mercedes-Benz Center as
soon as possible.
Important!
Always make sure that the indicator lamp in the
“SOS” button remains illuminated for approximately
5 seconds during the system self-check after turning
electronic key in starter switch to position 2.
Emergency calls
An emergency call is initiated automatically following
an accident in which the Emergency Tensioning
Retractors (ETR’s) or airbags deploy. An emergency call
can also be initiated manually by opening the cover next
to the inside rear view mirror labeled “SOS”, then

324 Towing the vehicle
Te ch n i c a l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hintsCar care Index
Use wheel lift, dolly, or flat bed equipment, with
electronic key in starter switch turned to position 0.
Note:
To signal turns while being towed with hazard warning
flasher in use, turn electronic key in starter switch to
position 2 and activate combination switch for left or
right turn signal in usual manner – only the selected
turn signal will operate.Upon canceling the turn signal, the hazard warning
flasher will operate again.
Caution!
If the vehicle is towed with the front axle raised, the
engine must be shut off (electronic key in starter switch
position 0 or 1). Otherwise, the ESP will immediately be
engaged and will apply the rear wheel brakes.
Switch off the tow-away alarm (see page 39) as well as
the ESP (see page 260).
Wa r n i n g !
With the engine not running, there is no power
assistance for the braking and steering systems. In
this case, it is important to keep in mind that a
considerably higher degree of effort is necessary to
brake and steer the vehicle.

364 Index
Te ch n i c a l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car careIndex
Index
AAirbags .............................................................................. 65
ANTILOCK BRAKE SYSTEM
Malfunction and warning message ........................277
Antilock brake system (ABS) .......................................258
Antitheft alarm system ................................................... 38
Ashtrays .......................................................................... 199
Audio system
Button and soft key operation ................................. 163
Cassette mode ........................................................... 169
CD changer ................................................................ 174
CD mode ..................................................................... 173
Operating and display elements ............................. 161
Operating safety ........................................................ 160
Operation ................................................................... 163
Operation Audio and telephone .............................. 160
Radio mode ................................................................ 166
Telephone operation ................................................. 177
Audio systems .................................................................. 98
Cassette player .......................................................... 100
CD Player ...................................................................... 99
Radio ............................................................................. 98Automatic central locking ..............................................34
Automatic climate control ............................................ 146
Activated charcoal filter ........................................... 154
Adjustable air outlets,
rear passenger compartment ............................. 159
Air recirculation ........................................................ 153
Air volume, manual .................................................. 151
Basic setting ............................................................... 150
Defrosting ................................................................... 152
Display and controls ................................................. 148
Dust filter ................................................................... 150
Economy mode .......................................................... 155
Front center console storage
compartment ventilation ..................................... 158
Residual engine heat utilization ............................. 156
Special settings ......................................................... 151
Windows fogged up on the inside .......................... 152
Windows fogged up on the outside ........................ 152
Automatic transmission ............................................... 234
Fluid level ...................................................................301
Transmission selector lever,
manually unlocking ............................................ 325

370 Index
Te ch n i c a l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car careIndex
TTechnical data ................................................................ 351
Tele Aid ...........................................................................220
Initiating an emergency call ...................................222
Telephone ........................................................................ 101
Incoming call ............................................................. 105
Redialing .................................................................... 103
Telephone book ......................................................... 101
Telephone, general ........................................................ 211
Telephones and two-way radios ................................... 218
Telescoping steering column -
malfunction and warning messages ......................292
The first 1 000 miles (1 500 km) ................................ 219
Tire inflation pressure .................................................. 315
Tow-away alarm ................................................................ 39
Towing the vehicle ......................................................... 321
Transmission selector lever, manually unlocking ....325
Trip computer ................................................................. 107
Trunk ................................................................................. 35
Opening ........................................................................ 28
Release switch ............................................................. 37
Trunk lamp ..................................................................... 331
UUnlocking the vehicle with remote control .................27VVanity mirrors ................................................................ 192
Vehicle keys ......................................................................22
Vehicle tools ................................................................... 304WWhat you should know at the gas station ................. 264
Wheels ............................................................................ 306
Where to find it .................................................................. 7
Window curtain airbag ....................................................68
Windshield washer system .......................................... 302
Wiper blade
Replacing insert ....................................................... 337