2003 MERCEDES-BENZ C240 4MATIC trunk

85 Controls in detail
Locking and unlocking
Factory setting
Global unlocking
Press button
Œ
.
All turn signal lamps blink once. The
locking knobs in the doors move up.
The vehicle will lock again automatically
within approximately 40 seconds of un-
locking if neither door nor trunk is opened,
the SmartKey is not inserted in the starter
switch, or the central locking switch is not
activated.Global locking

Press button
‹
.
All turn signal lamps blink three times.
The locking knobs in the doors move
down.
Selective setting
If you frequently travel alone, you may wish
to reprogram the key so that
pressing
Œ
only unlocks the driver’s
door and the fuel filler flap.

Press and hold buttons
Œ
and
‹

simultaneously for about five seconds
until battery check lamp5 blinks twice.
The key will then function as follows:
Unlocking driver’s door and fuel filler
flap

Press button
Œ
once.
Global unlocking

Press button
Œ
twice.
Global locking

Press button
‹
.Restoring to factory setting

Press and hold buttons
Œ
and
‹

simultaneously for about six seconds
until battery check lamp5 blinks twice.
iCanada only:
Only vehicles equipped with an
anti-theft alarm system* have
SmartKeys with integrated panic
button*6.!To prevent possible malfunction, avoid
exposing the key to high levels of elec-
tromagnetic radiation.
Warning!
G
When leaving the vehicle, always remove the
key from the starter switch, take it with you
and lock the vehicle. Do not leave children
unattended in the vehicle, or with access to
an unlocked vehicle. It is possible for chil-
dren to open a locked door from the inside,
which could result in an accident and/or
serious injury.

86 Controls in detailLocking and unlocking
Checking the batteries
Press button
‹
or
Œ
.
Battery check lamp5 lights up briefly
to indicate that the key batteries are in
order.Unlocking the trunk lid
You can unlock the trunk separately.
A minimum height clearance of 5.75 ft.
(1.75 m) is required to open the trunk lid.

Press button
Š
until trunk opens.
The trunk can also be opened from its in-
side in an emergency, see “Trunk lid emer-
gency release” (
page 89).
!If you can no longer lock or unlock the
vehicle with the key, then either the
batteries in the SmartKey are dis-
charged, the key is malfunctioning or
the vehicle battery is drained.

Check the batteries in the key
(page 86) and replace them if
necessary (
page 286).


Use the mechanical key to lock and
unlock the doors (
page 285) and
the trunk lid (
page 91) as re-
quired.


Check the vehicle battery
(page 303)
If the key is malfunctioning, contact an
authorized Mercedes-Benz Center.
!If battery check lamp5 does not light
up briefly during check, then the key
batteries are discharged.
Replace the batteries (
page 286).
You can obtain the required batteries
at any authorized Mercedes-Benz Cen-
ter.
!The trunk lid swings open upwards au-
tomatically. Always make sure that
there is sufficient overhead clearance.iIf the vehicle was previously centrally
locked, the trunk lid will lock automati-
cally when closed (
page 89). The
turn signals will flash three times to
confirm locking.
If the trunk lid was previously
separately locked (page 90), the
trunk lid will remain locked.

88 Controls in detailLocking and unlockingOpening the trunk from the inside
You can open the trunk from the inside if
the vehicle is stationary.
A minimum height clearance of 5.75 ft.
(1.75 m) is required to open the trunk lid.
The switch is located on the driver’s door.
1Remote trunk lid release switch with in-
dicator lamp
Press remote trunk lid release
switch1.
The trunk lid opens. The indicator lamp
in the switch remains lit as long as the
trunk is open.The trunk can also be opened using the
SmartKey (
page 86) or from its inside in
an emergency, see “Trunk lid emergency
release” (
page 89).
Opening the trunk
A minimum height clearance of 5.75 ft.
(1.75 m) is required to open the trunk lid.
The handle is located above the rear li-
cense plate recess.
1Handle
Pull handle1 to open the trunk lid.
The trunk lid swings open upwards au-
tomatically. Always make sure that
there is sufficient overhead clearance.
!The trunk lid swings open upwards au-
tomatically. Always make sure that
there is sufficient overhead clearance.iIf the vehicle was previously centrally
locked, the trunk lid will lock automati-
cally when closed (
page 89). The
turn signals will flash three times to
confirm locking.
If the vehicle was previously separately
locked (
page 90) or locked with the
SmartKey (page 85), the trunk lid will
remain locked.
iThe vehicle must be unlocked.

89 Controls in detail
Locking and unlocking
Closing the trunk
1Handle
Lower trunk lid using the handle1.
Trunk lid emergency release
The emergency release button is located
on the inside of the trunk lid.
1Emergency release button
Briefly press the emergency release
button.
The trunk unlocks and the trunk lid
opens.
Warning!
G
To prevent possible personal injury, always
keep hands and fingers away from the trunk
opening when closing the trunk. Be espe-
cially careful when small children are
around.
Warning!
G
Only drive with the trunk closed as, among
other dangers such as visibility blockage,
exhaust fumes may enter the vehicle
interior.iTo prevent an inadvertent lockout, do
not place the key in the trunk.
!The emergency release button unlocks
and opens the trunk while the vehicle is
standing or driving.

90 Controls in detailLocking and unlockingIllumination of the emergency release but-
ton:

The button will blink for 30 minutes af-
ter opening the trunk.


The button will blink for 60 minutes af-
ter closing the trunk.
Separately locking the trunk
The lock is located next to the recessed
handle.
1Unlocked
2Locked

Close the trunk lid (
page 89).

Pull the mechanical key out of the
SmartKey (
page 285).

Insert the mechanical key in the trunk
lid lock.

Turn the key completely to the right to
position2.
The trunk remains locked even when the
vehicle is centrally unlocked.
!The emergency release button does
not open the trunk lid, if the vehicle
battery is discharged or disconnected.iIf the emergency release button is
pressed and the vehicle was centrally
locked, the exterior lamps will flash and
the alarm will sound as the trunk lid
opens.
To cancel the alarm, insert the key in
the starter switch or press button
Œ

or
‹
on the key.
iTo deny any unauthorized person ac-
cess to the trunk, lock it separately
with the mechanical key. Leave only
the SmartKey less its mechanical key
with the vehicle.
iYou can only cancel the separate trunk
locking mode by means of the mechan-
ical key.

91 Controls in detail
Locking and unlocking
Separately unlocking the trunk
Pull the mechanical key out of the
SmartKey (
page 285).

Insert the mechanical key in the trunk
lid lock.

Turn the key completely to the left to
position1, see above.
You can now open the trunk (
page 88).
Automatic central locking
The doors and the trunk automatically lock
when the ignition is switched on and the
wheels are turning at vehicle speeds of ap-
proximately 9 mph (15 km/h) or more.
You can open a locked door from the in-
side. Open door only when conditions are
safe to do so.
You can deactivate the automatic locking
using the control system (
page 129).
iUnlocking the trunk with the mechani-
cal key will trigger the anti-theft alarm
system. To cancel the alarm, do one of
the following:

Press button
Œ
or
‹
on the
SmartKey.


Insert the SmartKey in the starter
switch.
iThe doors unlock automatically after an
accident if the force of the impact ex-
ceeds a preset threshold.
The vehicle automatically locks when
the ignition is switched on and the
wheels are turning at vehicle speeds of
approximately 9 mph (15 km/h) or
more. You could therefore lock yourself
out when the vehicle

is pushed


is on a test stand

92 Controls in detailLocking and unlockingLocking and unlocking from the inside
You can lock or unlock the doors and the
trunk from inside using the central locking
switch. This can be useful, for example, if
you want to lock the vehicle before starting
to drive.
The fuel filler flap cannot be locked or un-
locked with the central locking switch.The switch is located in the center console.
Central locking switch1Locking
2Unlocking
Locking
Press upper half1 of the central lock-
ing switch.
If both front doors are closed, the vehi-
cle locks.Unlocking

Press lower half2 of the central lock-
ing switch.
The vehicle unlocks.
Warning!
G
When leaving the vehicle, always remove the
key from the starter switch, take it with you
and lock the vehicle. Do not leave children
unattended in the vehicle, or with access to
an unlocked vehicle. Unsupervised use of
vehicle equipment may cause an accident
and/or serious personal injury.
iYou can open a locked door from the
inside. Open door only when conditions
are safe to do so.
If the vehicle was previously centrally
locked using the SmartKey, it will not
unlock using the central locking switch.
If the vehicle was previously locked
with the central locking switch

while in the selective remote con-
trol mode, only the door opened
from the inside is unlocked.


while in the global remote control
mode, the complete vehicle is un-
locked when a door is opened from
the inside.

106 Controls in detailLightingSwitching right front reading lamp on
and off
Press button2.
The right reading lamp goes on.

Press button2 again.
The right reading lamp goes off.
Switching left front reading lamp on and
off

Press button6.
The left reading lamp goes on.

Press button6 again.
The left reading lamp goes off.
Switching all front interior lights on and
off

Press rocker switch in position5.
The interior lighting stays on while the
rocker switch is pressed in.

Press rocker switch to position3 or4.
The interior lighting goes out.
Door entry lamps
The appropriate door entry lamp switches
on if a door is opened in darkness and if
the interior lighting is switched to automat-
ic function.
The entry lamp switches off automatically
when the door is closed.
Trunk lamp
The trunk lamp switches on if the trunk lid
is opened.
If you leave the trunk open for an extended
period of time, the trunk lamp will switch
off automatically after approximately ten
minutes.
iIf you turn the key in the starter switch
to position0 and switch off the exterior
headlamps, the door entry lamps will
remain lit for approximately five min-
utes.