alarm MERCEDES-BENZ R500 2006 W251 User Guide

106 Safety and SecurityAnti-theft systemsDisarming the alarm system
Unlock the vehicle (
page 36).
The turn signal lamps flash once to
indicate that the vehicle is disarmed.Canceling the alarm
To cancel the alarm:
With the SmartKey

Insert the SmartKey in the starter
switch.
or

Press theŒ or ‹button on the
SmartKey.
With KEYLESS-GO*

Grasp an 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 40).
The SmartKey with KEYLESS-GO must
be inside the vehicle.
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.
iThe alarm system will rearm automati-
cally again after approximately
40 seconds if neither a door nor the
tailgate is opened.
iThe tow-away protection alarm is trig-
gered, for example, if the vehicle is
lifted on one side.
If the alarm stays on for more than
30 seconds, a call to the Response
Center is initiated automatically by the
Tele Aid* system (
page 311) provid-
ed Tele Aid* service was subscribed to
and properly activated, and that neces-
sary cellular service and GPS coverage
are available.

107 Safety and Security
Anti-theft systems
Arming the tow-away alarm
Make sure all doors and the tailgate are
closed.

Lock your vehicle.
The tow-away alarm is automatically
armed after about 10 seconds.
Disarming the tow-away alarm

Unlock your vehicle.Switching off the tow-away alarm
To prevent triggering the tow-away alarm
feature, switch off the tow-away alarm be-
fore towing the vehicle, or when parking on
a surface subject to movement, such as a
ferry or auto train.
If the tow-away alarm is set to default en-
abled (
on) in the control system and you
wish to retain the default setting, you can
switch off the tow-away alarm temporarily
on a one-time basis as follows:

Switch off the ignition (
page 38).
With the tow-away alarm set to default
enabled (
on) in the control system, the
following message appears in the mul-
tifunction display.

If you now wish to deactivate the
tow-away alarm on a one-time basis,
press button + or - on the mul-
tifunction steering wheel.
The tow-away alarm is switched off.
The following message appears in the
multifunction display.
iWhen you unlock your vehicle, the
tow-away protection disarms automati-
cally.
The tow-away alarm remains disarmed
until you lock your vehicle again.
iThe tow-away alarm feature can be set
to default enabled (
on) or disabled (
off
)
using the control system (
page 191).


108 Safety and SecurityAnti-theft systems
Exit and lock the vehicle (
page 67).
The alarm system is armed indepen-
dently of whether the tow-alarm is
switched on or off.Canceling tow-away alarm
To cancel the alarm after it has been
triggered:
With the SmartKey

Insert the SmartKey in the starter
switch.
or

Press theŒ or ‹button on the
SmartKey.With KEYLESS-GO*

Grasp an 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 40).
The SmartKey with KEYLESS-GO must
be inside the vehicle.
iThe tow-away alarm is switched off on
a one-time basis only. It will be armed
automatically the next time you lock
the vehicle.
If you have disabled the tow-away
alarm feature in the control system
(page 191), you can switch on the
tow-away alarm on a one-time basis as
described above.


112 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
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 tailgate is opened


the SmartKey is not inserted in the
starter switch


the central locking switch is not
activatedGlobal locking

Press button‹.
With the tailgate and all doors closed,
the turn signal lamps flash three times.
The locking knobs on 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 5 seconds
until battery check lamp5
(page 110) 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
disarmed.
Global unlocking

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

113 Controls in detail
Locking and unlocking
Global locking
Press button‹.
With the tailgate and all doors closed,
the turn signal lamps flash three times.
The locking knobs on the doors move
down. The anti-theft alarm system is
armed.
Restoring to factory setting

Press and hold buttonsŒ and‹
simultaneously for about 6 seconds
until battery check lamp5
(page 110) flashes twice.Checking the batteries

Press button‹orŒ.
Battery check lamp5 (
page 110)
comes on briefly to indicate that the
SmartKey batteries are in order.
!If you cannot lock or unlock the vehicle
with the SmartKey, then either the bat-
teries in the SmartKey are discharged,
the SmartKey is malfunctioning, or the
vehicle battery is drained.

Check the batteries in the
SmartKey and replace them if
necessary (
page 463).


Use the mechanical key to unlock
the driver’s door (
page 459).


Lock the vehicle as described in the
“Practical hints” section
(page 460).


Have the vehicle battery and the
vehicle battery connections
checked (
page 487).
If the SmartKey is malfunctioning, con-
tact an authorized Mercedes-Benz
Light Truck Center.
iIf battery check lamp5 does not
come on briefly during check, the
SmartKey batteries are discharged.
Replace the batteries (
page 463).
You can obtain the required batteries
at any authorized Mercedes-Benz Light
Truck Center.
iIf the batteries are checked within
signal range of the vehicle, pressing the
button‹orŒ will lock or un-
lock the vehicle accordingly.

118 Controls in detailLocking and unlockingFactory setting
Global unlocking
Grasp an 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.
The vehicle will lock again automatically
and reactivate the anti-theft alarm system
within approximately 40 seconds of
unlocking if


neither door nor tailgate is opened


the central locking switch is not
activatedGlobal locking

Press the lock button at an outside
door handle (
page 68) or the tailgate
(
page 120).
With the tailgate and all doors closed,
the turn signal lamps flash three times.
The locking knobs on 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 with
KEYLESS-GO so when you grasp the driv-
er’s door handle only the driver’s door and
the fuel filler flap unlocks.

Press and hold buttonsŒ and‹
simultaneously for about 6 seconds
until battery check lamp5
(page 115) 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.
i If the vehicle has been parked for more
than 72 hours, you must pull an outside
door handle in order to activate the
KEYLESS-GO function.
iThe vehicle could be inadvertently
unlocked if the SmartKey with
KEYLESS-GO is within 3 ft (1 m) of the
vehicle and

an outside door handle is splashed
with water
or


you attempt to clean the outside
door handle

119 Controls in detail
Locking and unlocking
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 the lock button on an outside
door handle (
page 68) or the tailgate
(
page 120).
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 6 seconds
until battery check lamp5
(page 115) flashes twice.Checking the battery

Press button‹orŒ.
Battery check lamp5 (
page 115)
comes on briefly to indicate that the
SmartKey with KEYLESS-GO battery is
in order.
!If you can no longer lock or unlock the
vehicle with the SmartKey with
KEYLESS-GO, then the battery in the
SmartKey is discharged, the SmartKey
with KEYLESS-GO is malfunctioning or
the vehicle battery is drained.

Check the battery in the SmartKey
with KEYLESS-GO (
page 119)
and replace it if necessary
(
page 463).


Use the mechanical key to unlock
the driver’ door (
page 459).


Lock the vehicle as described in the
“Practical hints” section
(page 460).


Have the vehicle battery and the
vehicle battery connections
checked (
page 487).
If the SmartKey with KEYLESS-GO is
malfunctioning, contact an authorized
Mercedes-Benz Light Truck Center.
iIf battery check lamp5 (
page 115)
does not come on briefly during check,
the SmartKey with KEYLESS-GO bat-
tery is discharged.
Replace the battery (
page 463).
You can obtain the required battery at
any authorized Mercedes-Benz Light
Truck Center.
iIf the battery is checked within signal
range of the vehicle, pressing the
button‹orŒ will lock or un-
lock the vehicle accordingly.

122 Controls in detailLocking and unlocking
Opening the tailgate
Opening the tailgate from the outside
A minimum height clearance of 7.2 ft
(2.20 m) is required to open the tailgate.
The handle is located above the rear
license plate recess.
Vehicles without KEYLESS-GO*:
The vehicle must be unlocked (
page 37).

Pull on the handle.
The tailgate opens slightly.

Pull tailgate upwards to open.The tailgate can also be opened using the
SmartKey (
page 114).
iIf the vehicle has previously been
locked from the outside with the
SmartKey or KEYLESS-GO*, opening a
door from the inside will trigger the
anti-theft alarm system.
To cancel the alarm, do one of the
following:
With the SmartKey

Insert the SmartKey in the starter
switch.


Press theŒ or ‹button on
the SmartKey.
With KEYLESS-GO*


Grasp an outside door handle.


Press the KEYLESS-GO start/stop
button (
page 40).
The SmartKey with KEYLESS-GO
must be inside the vehicle.
!Vehicles with tailgate opening/closing
system*:
To stop the opening procedure, press
buttonŠ on the SmartKey. The tail-
gate stops moving.
The tailgate swings open upwards auto-
matically. Always make sure there is
sufficient overhead clearance.iIf the vehicle was previously centrally
locked, the tailgate will lock automati-
cally after closing it (
page 124). The
turn signals will flash three times to
confirm locking.

129 Controls in detail
Locking and unlocking
Closing the tailgate and locking the
vehicle from the outside (vehicles with
KEYLESS-GO*)
In vehicles with tailgate opening/closing
system* and KEYLESS-GO*, you can close
the tailgate and lock the vehicle simulta-
neously from the outside using the
KEYLESS-GO* locking/closing switch or
the Šbutton on the SmartKey.
1KEYLESS-GO* locking/closing switch
Make sure you have the SmartKey with
KEYLESS-GO* with you.

Press switch1 briefly.
The vehicle is locked and the tailgate
closes automatically. The turn signals
flash three times to confirm locking.
The locking knobs in the doors move
down. The anti-theft alarm system is
armed.
If the tailgate comes into contact with an
object while closing (e.g. luggage that has
been piled too high), the closing procedure
is stopped and the tailgate reopens
slightly.
Even with the SmartKey with KEYLESS-GO*
removed from the vehicle, the tailgate
closing switch can be operated. Therefore,
do not leave children unattended in the ve-
hicle, or with access to an unlocked vehicle.
Unsupervised use of vehicle equipment may
cause an accident and/or serious personal
injury.Warning!
G
Only drive with the tailgate closed as,
among other dangers such as blocked
visibility, exhaust fumes may enter the vehi-
cle interior.iIf the vehicle was previously centrally
locked, the tailgate will lock automati-
cally after closing it. The turn signals
will flash three times to confirm lock-
ing.
iYou can also close the tailgate manual-
ly (
page 125).
iTo prevent a possible inadvertent lock-
out, the tailgate will open automatically
if a SmartKey with KEYLESS-GO* is
recognized inside the vehicle.

167 Controls in detail
Control system
Menus, submenus and functions
Menu6
Menu7
Menu8
Menu9
Settings
Vehicle configuration
Trip computer
Telephone*
(page 174)
(page 191)
(page 192)
(page 194)
Commands/submenusResetting to factory settings
Tow-away alarm on/off
Fuel consumption statistics
after start
Loading phone book
Instrument cluster submenu
Fuel consumption statistics
since the last reset
Searching for name in phone
book
Time/Date submenu
Calling up range (distance to
empty)
Lighting submenuVehicle submenuConvenience submenuiThe headings used in the menus table
are designed to facilitate navigation
within the system and are not neces-
sarily identical to those shown in the
control system displays.
The first function displayed in each
menu will automatically show you
which part of the system you are in.