2005 MERCEDES-BENZ S500 alarm

87 Safety and Security
Anti-theft systems
Anti-theft alarm system
Once the alarm system has been armed, a
visual and audible alarm is triggered when
someone opens:

a door


the trunk


the hood
The alarm will stay on even if the activating
element (a door, for example) is immedi-
ately closed.The alarm system will also be triggered
when


someone attempts to raise the vehicle


the vehicle is opened with the
mechanical key


someone opens a door from the inside
if the vehicle was locked from the out-
side with the SmartKey


someone opens the trunk lid with the
emergency release buttonArming the alarm system
The indicator lamp located in the central
locking switch in on the upper part of the
front center console.
1Indicator lamp

Lock your vehicle.
The turn signal lamps flash three times
to indicate that the alarm system is ac-
tivated. The indicator lamp1 flashes
to indicate that the alarm system is
armed.
iIf the alarm stays on for more than
30 seconds, a call to the Response
Center is initiated automatically by the
by the Tele Aid system (
page 255)
provided Tele Aid service was sub-
scribed to and properly activated, and
that necessary cellular service and GPS
coverage are available.

88 Safety and SecurityAnti-theft systemsDisarming the alarm system
Unlock your vehicle.
The turn signal lamps flash once to in-
dicate that the alarm system is deacti-
vated.Canceling the alarm
To cancel the alarm:
With the SmartKey

Insert the SmartKey in the starter
switch.
or

Press the Œ or ‹ button on the
SmartKey.
The alarm is canceled.With KEYLESS-GO*

Grasp the outside door handle.
The SmartKey with KEYLESS-GO must
be within 3 ft. (1 m) of the vehicle.
or

Press the KEYLESS-GO* start/stop
button (
page 35).
The SmartKey with KEYLESS-GO must
be inside the vehicle.
The alarm is canceled.
iIf the turn signal lamps does not flash
three times one of the following ele-
ments may not be properly closed:

a door


the trunk


the hood
Close the respective element and lock
the vehicle again.
iThe alarm system will rearm automati-
cally again after approximately 40 sec-
onds if no door was opened.

89 Safety and Security
Anti-theft systems
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.Arming tow-away alarm

Lock your vehicle.
The tow-away alarm is automatically
armed after about 30 seconds.Disarming tow-away alarm
To prevent triggering the tow-away alarm,
switch off the tow-away alarm feature be-
fore towing the vehicle, or when parking on
a surface subject to movement, such as a
ferry or auto train.
iThe tow-away protection alarm is trig-
gered, for example, if the vehicle is lift-
ed on one side.
If the alarm stays on for more than
30 seconds, a call to the Response
Center is initiated automatically by the
by the Tele Aid system (
page 255)
provided Tele Aid service was sub-
scribed to and properly activated and
that necessary cellular service and GPS
coverage are available.

90 Safety and SecurityAnti-theft systemsThe button is located on the upper part of
the front center console.
1Indicator lamp
2Tow-away alarm off button

Switch off the ignition and remove the
SmartKey from the starter switch.

Press button2.
The indicator lamp1 in the button
comes on briefly.

Exit the vehicle and lock it with the
SmartKey or (vehicles with
KEYLESS-GO*) the lock button at each
outside door handle or trunk lid.
iYou cannot disarm the tow-away alarm
if the ignition is switched on.
iWhen you unlock your vehicle, the
tow-away protection disarms automati-
cally.
The tow-away alarm remains disarmed
until you lock your vehicle again.

94 Controls in detailLocking and unlockingFactory setting
Global unlocking
Press buttonŒ.
All turn signal lamps flash once. The
locking knobs in the doors move up.
The anti-theft alarm system is dis-
armed.
The vehicle will lock again automatically
and reactivate the anti-theft alarm system
within approximately 40 seconds of un-
locking if:


neither door nor trunk is opened


the SmartKey is not inserted in the
starter switch


the central locking switch is not acti-
vatedGlobal locking

Press button‹.
All turn signal lamps flash three times.
The locking knobs in the doors move
down. The anti-theft alarm system is
armed.
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 lamp5 flashes
twice.
The SmartKey will then function as fol-
lows:Unlocking driver’s door and fuel filler
flap

Press buttonΠonce.
All turn signal lamps flash once. The
locking knob in the driver's door moves
up. The anti-theft alarm system is dis-
armed.
Global unlocking

Press buttonΠtwice.
All turn signal lamps flash once. The
locking knobs in the doors move up.
The anti-theft alarm system is dis-
armed.
Global locking

Press button‹.
All turn signal lamps flash three times.
The locking knobs in the doors move
down. The anti-theft alarm system is
armed.

99 Controls in detail
Locking and unlocking


If the SmartKey with KEYLESS-GO is re-
moved from the vehicle while the igni-
tion is switched on (e.g. if passenger
exits the vehicle with the SmartKey
with KEYLESS-GO), the message KEY
NOT RECOGNIZEDwill appear in the multifunction display
while driving off.
Find the SmartKey or change its
present location immediately
(e.g. place it on the front passenger
seat or insert it in shirt pocket).


Remember that the engine can be
started by anyone with a SmartKey
with KEYLESS-GO that is left inside the
vehicle. If you leave the SmartKey with
KEYLESS-GO behind when exiting and
locking the vehicle, the message KEY
STILL IN VEHICLEwill appear in the multifunction display.Factory setting
Global unlocking

Grasp the outside door handle.
All turn signal lamps flash once. The
locking knob in the doors move up. The
anti-theft alarm system is disarmed.
The vehicle will lock again automatically
and reactivate the anti-theft alarm system
within approximately 40 seconds of un-
locking if:


neither door nor trunk is opened


the central locking switch is not acti-
vated.Global locking

Press lock button at the outside door
handle (
page 58) or trunk lid
(
page 101).
All turn signal lamps flash three times.
The locking knobs in the doors move
down. The anti-theft alarm system is
armed.
iIf the vehicle has been parked for more
than 72 hours, you must pull the out-
side door handle in order to activate
the KEYLESS-GO function.
iThe vehicle could inadvertently be un-
locked if the SmartKey with
KEYLESS-GO is within 3 ft. (1 m) of the
vehicle and:

the outside door handle is splashed
with water, or


you attempt to clean the outside
door handle.

100 Controls in detailLocking and unlockingSelective setting
If you frequently travel alone, you may wish
to reprogram the SmartKey with
KEYLESS-GO so when you, grasp the driv-
er’s outside door handle only the driver’s
door and the fuel filler flap unlocks.
Press and hold buttonsŒ and‹
simultaneously for about six seconds
until battery check lamp5 flashes
twice.
The SmartKey with KEYLESS-GO will
then function as follows:
Unlocking driver’s door and fuel filler
flap

Grasp the driver’s outside door handle.
All turn signal lamps flash once. The
locking knob in the driver's door moves
up. The anti-theft alarm system is dis-
armed.Global unlocking

Grasp any outside door handle other
than the driver’s outside door handle.
All turn signal lamps flash once. The
locking knobs in the doors move up.
The anti-theft alarm system is dis-
armed.
Global locking

Press lock button at outside door han-
dle (
page 58).
All turn signal lamps flash three times.
The locking knobs in the doors move
down. The anti-theft alarm system is
armed.Restoring to factory setting

Press and hold buttonsŒ and‹
simultaneously for about six seconds
until battery check lamp5 flashes
twice.
iYou can also lock the vehicle using the
lock button at trunk lid (
page 101)
or, vehicles with trunk lid
opening/closing system*,
KEYLESS-GO locking/closing switch
(
page 110).
!If you can not lock or unlock the vehicle
with the SmartKey with KEYLESS-GO,
then either the battery in the SmartKey
with KEYLESS-GO is discharged, the
SmartKey with KEYLESS-GO is mal-
functioning or the vehicle battery is
drained.

Check the battery in the SmartKey
with KEYLESS-GO and replace it if
necessary (
page 387).


Use the mechanical key to unlock
the driver’s door (
page 383) and
trunk (
page 384).


Use the mechanical key to lock the
driver’s door (
page 383).

101 Controls in detail
Locking and unlocking
Checking the battery
Press button‹ orŒ.
Battery check lamp5 comes on brief-
ly to indicate that the SmartKey with
KEYLESS-GO battery is in order.Global locking using the lock button at
trunk lid
1Vehicle lock button

Press vehicle lock button1.
All turn signal lamps flash three times.
The locking knobs in the doors move
down. The anti-theft alarm system is
armed.


Have the vehicle battery and the
battery connections checked
(page 403).
If the SmartKey with KEYLESS-GO is
malfunctioning, contact an authorized
Mercedes-Benz Center.
!If battery check lamp5 does not
come on briefly during check, the
SmartKey battery with KEYLESS-GO is
discharged.
Replace the battery (
page 387).
You can obtain the required battery at
any authorized Mercedes-Benz Center.
iIf the battery is checked within signal
range of the vehicle, pressing the
button‹ orŒ will lock or unlock
the vehicle accordingly.iTo prevent a possible inadvertent lock-
out, the trunk will open automatically if
a SmartKey with KEYLESS-GO is recog-
nized inside the vehicle or in the trunk.
iYou can also lock the vehicle using the
lock button at outside door handle
(page 58) or, vehicles with trunk lid
opening/closing system*,
KEYLESS-GO locking/closing switch
(page 110).