2004 MERCEDES-BENZ C240 4MATIC WAGON Owner's Manual

81 Safety and Security
Anti-theft systems
Disarming the alarm system
The alarm system is disarmed when you
unlock your vehicle with the SmartKey. The
turn signal lamps flash once to indicate
that the alarm system is deactivated.
Canceling the alarm
To cancel the alarm:
Insert the SmartKey in the starter
switch.
or

Press theŒ or‹ button on the
SmartKey.
Tow-away alarm*
Once the tow-away alarm is armed, a visual
and audible alarm will be triggered when
someone attempts to raise the vehicle.
iIf the turn signal lamps do not flash
three times, one of the following
elements may not be properly closed:

a door


the tailgate
Close the respective element and lock
the vehicle again.
iThe alarm system will rearm automati-
cally after approximately 40 seconds if
no door or the tailgate lid was opened.
iThe tow-away protection alarm is
triggered, for example, if the vehicle is
lifted on one side.
If the alarm stays on for more than
20 seconds, an emergency call is
initiated automatically by the Tele Aid
system* (
page 222) provided
Tele Aid service was subscribed to and
properly activated, and that necessary
cellular service and GPS coverage are
available.

82 Safety and SecurityAnti-theft systemsArming tow-away alarm
When you lock your vehicle, the tow-away
alarm is automatically armed after about
30 seconds.
When you unlock your vehicle, the
tow-away protection disarms
automatically.
Disarming tow-away alarm
To prevent triggering the tow-away alarm,
switch off the tow-away alarm feature
before towing the vehicle, or when parking
on a surface subject to movement, such as
a ferry or auto train.The switch is located on the center
console.
1Tow-away alarm off switch
2Indicator lamp

Switch off the ignition and remove the
SmartKey.

Press upper switch position1.
Indicator lamp2 in switch comes on
briefly.

Exit and lock your vehicle with the
SmartKey.
The tow-away alarm remains disarmed
until you lock your vehicle again.
Canceling the alarm
To cancel the alarm:

Insert the SmartKey in the starter
switch.
or

Press theŒ or‹ button on the
SmartKey.
iYou cannot disarm the tow-away alarm
while the ignition is switched on.

83 Controls in detail
Locking and unlocking
Seats
Memory function*
Lighting
Instrument cluster
Control system
Automatic transmission
Good visibility
Climate control
Automatic climate control*
Audio system
Power windows
Sliding/pop-up roof*
Driving systems
Loading
Useful features

84 Controls in detailLocking and unlocking
In the “Controls in detail” section you will
find detailed information on how to oper-
ate the equipment installed on your vehi-
cle. If you are already familiar with the
basic functions of your vehicle, this section
will be of particular interest to you.
To quickly familiarize yourself with the ba-
sic functions of the vehicle, refer to the
“Getting started” section of this manual.
The corresponding page numbers are giv-
en at the beginning of each segment.
Locking and unlocking
SmartKey
Your vehicle comes supplied with two
SmartKeys, each with remote control and
a removable mechanical key. The locking
tabs for the mechanical key portion of the
two SmartKeys are a different color to help
distinguish each SmartKey unit.
The SmartKey provides an extended oper-
ating range. To prevent theft, however, it is
advisable to only unlock the vehicle when
you are in close proximity to it.
The SmartKey centrally locks and unlocks:

the doors


the tailgate


the fuel filler flap
SmartKey with remote control1‹ Lock button
2Mechanical key locking tab
3ΠUnlock button
4Battery check lamp
5Â Panic button* (
page 73)
iYou can also open and close the power
windows (
page 198) and
sliding/pop-up roof* (
page 200)
from outside using the SmartKey.
iCanada only:
Only vehicles equipped with an
anti-theft alarm system* have
SmartKeys with integrated panic
button*5.

85 Controls in detail
Locking and unlocking
Factory setting
Global unlocking
Press buttonŒ.
All turn signal lamps flash once. The
locking knobs in the doors move up.
The vehicle will lock again automatically
within approximately 40 seconds of
unlocking if:


neither door nor tailgate is opened


the SmartKey is not inserted in the
starter switch


the central locking switch is not
activatedGlobal locking

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

Press and hold buttonsŒ and‹
simultaneously for about five seconds
until battery check lamp4 flashes
twice.
The SmartKey will then function as
follows:
Unlocking driver’s door and fuel filler
flap
Press buttonΠonce.Global unlocking

Press buttonΠtwice.
Global locking

Press button‹.
Restoring to factory setting

Press and hold buttonsŒ and‹
simultaneously for about six seconds
until battery check lamp4 flashes
twice.
!To prevent possible malfunction, avoid
exposing the SmartKey to high levels of
electromagnetic radiation.
Warning!
G
When leaving the vehicle, always remove the
SmartKey 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 children 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‹ orŒ.
Battery check lamp4 comes on
briefly to indicate that the SmartKey
batteries are in order.Loss of SmartKey or mechanical key
If you lose a SmartKey or mechanical key,
you should do the following:

Have the SmartKey deactivated by an
authorized Mercedes-Benz Center.

Report the loss of the SmartKey or the
mechanical key immediately to your
car insurance company.

If necessary, have the mechanical lock
replaced.
Your authorized Mercedes-Benz Center
will be glad to supply you with a replace-
ment.
!If you can no longer lock or unlock the
vehicle with the SmartKey, then either
the batteries in the SmartKey are dis-
charged, the SmartKey is malfunction-
ing, or the vehicle battery is drained.

Check the batteries in the
SmartKey (
page 86) and replace
them if necessary (
page 306).
or


Use the mechanical key to unlock
the doors (
page 305) as required.
or


Use the mechanical key to lock the
doors (
page 306) as required.
or


Have the vehicle battery and the
battery connections checked.
If the SmartKey is malfunctioning,
contact an authorized Mercedes-Benz
Center.
!If battery check lamp4 does not
come on briefly during check, then the
SmartKey batteries are discharged.
Replace the batteries (
page 306).
You can obtain the required batteries
at any authorized Mercedes-Benz
Center.
iIf the batteries are checked within
signal range of the vehicle, pressing
the‹ orŒ button will lock or
unlock the vehicle accordingly.

87 Controls in detail
Locking and unlocking
Opening the doors from the inside
You can open a locked door from the
inside. Open door only when conditions
are safe to do so.
1Locking knob
2Inside door handle
Pull on door handle2.
If door was locked, locking knob1 will
move up.
Opening the tailgate
A minimum height clearance of 6.40 ft
(1.95 m) is required to open the tailgate.
The handle is located above the rear
license plate recess.
1Handle
Pull on handle1 and lift the tailgate.
iIf the vehicle has previously been
locked from the outside with the
SmartKey, opening a door from the
inside will trigger the anti-theft alarm
system*.
To cancel the alarm, do one of the
following:

Press buttonŒ or‹ on the
SmartKey.


Insert the SmartKey in the starter
switch.
!The tailgate swings open upwards
automatically. Always make sure there
is sufficient overhead clearance.

88 Controls in detailLocking and unlockingClosing the tailgate
1Handle
Lower tailgate by pulling firmly on
handle1.

Close tailgate with hands placed flat on
it.
Automatic central locking
The doors and the tailgate automatically
lock when the ignition is switched on and
the wheels are turning at vehicle speeds of
approximately 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.
iThe vehicle must be unlocked.
Warning!
G
To prevent possible personal injury, always
keep hands and fingers away from the tail-
gate opening when closing the tailgate. Be
especially careful when small children are
around.Warning!
G
Only drive with the tailgate closed as
exhaust fumes may enter the vehicle
interior.iDo not place the SmartKey in the open
cargo compartment. You may lock
yourself out.
iThe doors unlock automatically after an
accident if the force of the impact
exceeds 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 or towed


is on a test stand