2001 MERCEDES-BENZ C320 fuel

30 Central locking system
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Panic button
To activate press and hold button (1) for at least one
second. An audible alarm and blinking exterior lamps
will operate for approximately 3 minutes.
To deactivate press button (1) again, or insert electronic
key in starter switch.Note:
For operation in the USA only: This device complies
with Part 15 of the FCC Rules. Operation is subject to
the following two conditions:
(1) This device may not cause harmful interference, and
(2) this device must accept any interference received,
including interference that may cause undesired
operation.
Any unauthorized modification to this device could void
the user’s authority to operate the equipment.
Mechanical keys
The mechanical keys work only in driver’s door, trunk,
and storage compartment locks.
Notes:
The mechanical key does not operate the central locking
system or antitheft alarm system.
The fuel filler flap cannot be locked or unlocked with
the mechanical key.
If the fuel filler flap cannot be opened, see page 335.
P80.35-2035-26
1

32 Central locking system
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
If the vehicle has previously been locked from the
outside, opening a door from the inside will trigger the
alarm. When opening a front door while the central
locking system is in the:
•selective unlocking mode, only that individual door
is unlocked. The remaining doors, the trunk and
fuel filler flap remain locked.
•global unlocking mode, all doors, the trunk and fuel
filler flap are unlocked.
Notes:
In case of a malfunction in the central locking system
the doors can be locked and unlocked individually.
To lock, push down lock buttons or turn mechanical key
in driver’s door lock to position 3. In addition lock the
trunk.To unlock, pull inside door handles or turn mechanical
key in driver’s door lock to position 2.
Rear doors can only be opened from inside by first
pulling up the door lock button.
When unlocking the driver’s door 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.

33 Central locking system
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Central locking switch
1Locking
2Unlocking
The central locking switch is located in the center
console.
The doors and trunk can only be locked with the central
locking switch, if both front doors are closed.
If the vehicle was previously locked with the central
locking switch, while in the selective remote control
mode, only the door opened from the inside is unlocked.If the vehicle was previously locked with the central
locking switch, while in the global remote control mode,
the complete vehicle is unlocked when a door is opened
from the inside.
Notes:
If the vehicle was previously locked with the remote
control, the doors and trunk cannot be unlocked with
the central locking switch.
The fuel filler flap cannot be locked or unlocked with
the central locking switch.
If the vehicle has previously been locked from the
outside, opening a door from the inside will trigger the
alarm. To cancel the alarm, insert the electronic key in
the starter switch or press buttonŒ or‹ on the
electronic main key.
P54.25-2417-26
Wa r n i n g !
When leaving the vehicle always remove the
electronic key from the starter switch, and lock
your vehicle. Do not leave children unattended in
the vehicle, or with access to an unlocked vehicle.
Unsupervised use of vehicle equipment may cause
serious personal injury.

34 Central locking system
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Automatic central locking
Wit h t he autom ati c c entral lockin g s ystem ac ti vate d, t he
doors and trunk are locked at vehicle speeds of
approximately 9 mph (15 km / h) or more. The fuel filler
flap remains unlocked.
The automatic central locking function can be switched
on or off. See page 111 for “Individual settings”.
Notes:
If doors are unlocked with the central locking switch
after activating the automatic central locking, and
neither door is opened, then the doors remain unlocked
even at vehicle speeds of approximately 9 mph
(15 km / h) or more.
If a door is opened from the inside at speeds of
approximately 9 mph (15 km / h) or less with the
automatic central locking activated, the door will again
be automatically locked at speeds of approximately
9 mph (15 km / h) or more.Important!
When towing the vehicle, or with the vehicle on a
dynamometer test stand, please, note the following:
With the automatic central locking activated and the
electronic key in starter switch position 2, the vehicle
doors will lock if the left front wheel as well as the right
rear wheel spin at vehicle speeds of approximately
9 mph (15 km / h) or more.
To prevent the vehicle door locks from locking,
deactivate the automatic central locking. See page 111
for “Individual settings” - “VEHICLE”.
Emergency unlocking in case of accident
The doors unlock automatically a short time after an
accident in which an airbag or emergency tensioning
retractor deploys (this is intended to aid rescue and
exit).

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.

89 Instrument cluster
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index 1Knob for instrument cluster illumination,
seepage90
Reset knob for trip odometer, see page 91 and
individual settings, see page 111
2Tachometer
3Antilock brake system (ABS) malfunction indicator
lamp, see page 272
4Brake fluid low or parking brake engaged,
seepage278
5Speedometer
6Left turn signal indicator lamp, see combination
switch on page 134
7Electronic stability program (ESP) warning lamp,
system is adjusting to road conditions, see page 273
8Indicator lamp without function. It illuminates with
the electronic key in starter switch position 2. It
should go out when the engine is running.
9CHECK ENGINE malfunction indicator lamp,
seepage268
10High beam headlamp indicator,
seeexterior lamp switch, page130, and
combination switch, see page 13411High beam headlamp indicator,
exterior lamp switch, see page 130 and
combination switch, see page 134.
12Multifunction display, see page 92
Instrument cluster display, see page 274
13Trip odometer, see page 91 and 96
14Main odometer, see page 96
15Display for program mode and gear range
indicators, page 237
16Malfunction/warning message memory,
seepage109
17Outside temperature indicator, see page 91
18Digital clock
To set the time, see individual settings on page 111
19Right turn signal indicator lamp, see combination
switch on page 134
20Fasten seat belts, see page 273
21Supplemental restraint system (SRS) malfunction
indicator lamp, see page 271
22Fuel gauge with reserve and fuel cap placement
warning lamp, see page 271

91 Instrument cluster
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Outside temperature indicator (17)
The temperature sensor is located in the front bumper
area. Due to its location, the sensor can be affected by
road or engine heat during idling or slow driving. This
means that the accuracy of the displayed temperature
can only be verified by comparison to a thermometer
placed next to the sensor, not by comparison to external
displays (e.g. bank signs etc.).
Adaption to ambient temperature takes place in steps
and depends on the prevailing driving conditions (stop-
and-go or moderate, constant driving) and amount of
temperature change.
Note:
The temperature indicator display can be set to read out
in either Fahrenheit or Celsius. See page 111.Trip odometer (13)
To reset to “0” miles / km:
Activate the instrument cluster if it is not already
activated, see page 90.
Press button è or ÿ on the multifunction
steering wheel repeatedly until the trip odometer
appears if it is not displayed. See page 96.
Press button (1) on the instrument cluster, see page 90.
Tachometer (2)
The red marking on the tachometer denotes excessive
engine speed.
Avoid this engine speed, as it may result in serious
engine damage that is not covered by the
Mercedes-Benz Limited Warranty.
To help protect the engine, the fuel supply is interrupted
if the engine is operated within the red marking.
Wa r n i n g !
The outside temperature indicator is not designed
to serve as an Ice-Warning Device and is therefore
unsuitable for that purpose. Indicated
temperatures just above the freezing point do not
guarantee that the road surface is free of ice.

93 Multifunction steering wheel, multifunction display
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Depending on your vehicle’s equipment, you may use
the buttons on the multifunction steering wheel to call
up, control and set the following systems in the
multifunction display:
1Trip odometer and main odometer, see page 91 and
page 96
Flexible service system (FSS), see page 125
Vehicle speed, see page 96
Coolant temperature gauge, see page 124
Engine oil level indicator, see page 128
2Audio systems, see page 98
Radio, see page 98
CD player, see page 99
Cassette player, see page 1003Navigation system, see page 106
4Malfunction message memory, see page 109
5Individual settings, see page 111
6Trip computer, see page 107
After start
After reset
Fuel tank content
7Telephone, see page 101
Press the è or ÿ button repeatedly until the
required system is displayed.
The display advances by one system each time the
button is pressed.
You may call up add ition al d is plays wit hin som e of t hes e
categories by pressing the j or k button.