keyless MERCEDES-BENZ R500 2006 W251 Owner's Guide

93 Safety and Security
Occupant safety
4Anchors third-row seats
Install a LATCH type child seat accord-
ing to the manufacturer’s instructions.
Blocking of rear door window operation
With the override switch you can disable
the rear side window switches in the rear
door panels.
iNon-LATCH type child seats may also
be used and can be installed using the
vehicle’s seat belt system. Install child
seat according to the manufacturer’s
instructions.
Warning!
G
Children too big for a toddler restraint must
ride in seats using regular seat belts. Posi-
tion shoulder belt across chest and shoul-
der, not face or neck. A booster seat may be
necessary to achieve proper belt positioning
for children from 41 lbs until they reach a
height where a lap / shoulder belt fits prop-
erly without a booster.
Install child seat according to manufactu-
rer’s instructions.
The child seat must be firmly attached in the
right and left side anchors 1.
An incorrectly mounted child seat may come
loose during an accident which could result
in serious injury or death to the child.
Damaged or impact damaged child seats or
child seat mounting fittings must be re-
placed.
Do not leave children unattended in the ve-
hicle, even if the children are secured in a
child restraint system.
Warning!
G
Activate the override switch when children
are riding in the back seats of the vehicle.
The children may otherwise injure them-
selves, e.g. by becoming trapped in the win-
dow opening.
When leaving the vehicle, always remove the
SmartKey or SmartKey with KEYLESS-GO*
from the starter switch, take it with you, and
lock the vehicle. Do not leave children unat-
tended in the vehicle, or with access to an
unlocked vehicle. Unsupervised use of vehi-
cle equipment may cause an accident
and/or serious personal injury.

95 Safety and Security
Panic alarm
Panic alarm
An audible alarm and flashing exterior
lamps will operate for approximately
21/2minutes.
SmartKey1Âbutton
SmartKey with KEYLESS-GO*1Âbutton
iUSA 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 inter-
ference received, including interfer-
ence that may cause undesired
operation.
Any unauthorized modification to this
device could void the user’s authority
to operate the equipment.iCanada only:
This device complies with RSS-210 of
Industry Canada. Operation is subject
to the following two conditions:
(1) This device may not cause
interference, and
(2) this device must accept any inter-
ference received, including interfer-
ence that may cause undesired
operation of the device.
Any unauthorized modification to this
device could void the user’s authority
to operate the equipment.

96 Safety and SecurityPanic alarmActivating
Press and hold button1 for at least
1 second.
Deactivating
Press button1 again.
or

Insert SmartKey or the SmartKey with
KEYLESS-GO* in starter switch.
or

Press the KEYLESS-GO* start/stop
button (
page 40).
The SmartKey with KEYLESS-GO* must
be in the vehicle.

100 Safety and SecurityDriving safety systems
For more information, see the “Practical
hints” section (
page 409).
Warning!
G
Never switch off the ESP
® when you see the
ESP
® warning lampv flashing in the in-
strument cluster. In this case, proceed as
follows:


While driving off, apply as little throttle
as possible.


While driving, ease up on the accelera-
tor.


Adapt your speed and driving style to
the prevailing road conditions.
Failure to observe these guidelines could
cause the vehicle to skid.
The ESP
® cannot prevent accidents result-
ing from excessive speed.
Warning!
G
The ESP
® cannot prevent the natural laws of
physics from acting on the vehicle, nor can
it increase the traction afforded. The ESP
®
cannot prevent accidents, including those
resulting from excessive speed in turns, fol-
lowing another vehicle too closely, or hydro-
planing. Only a safe, attentive, and skillful
driver can prevent accidents. The capabili-
t i e s o f a n E S P
® equipped vehicle must never
be exploited in a reckless or dangerous
manner which could jeopardize the user’s
safety or the safety of others.
iThe ESP
® will only function properly if
you use wheels of the recommended
tire size (page 514).
!Because of the ESP’s
® automatic oper-
ation, the engine and ignition must be
shut off (SmartKey in starter switch
position0 or1 or KEYLESS-GO*
start / stop button* in position0 or1)
when


the parking brake is being tested on
a brake test dynamometer


the vehicle is being towed with the
front or rear axle raised
Active braking action through the ESP
®
may otherwise seriously damage the
brake system.
Operational tests with the engine
running can only be conducted on a
two-axle dynamometer.

104 Safety and SecurityAnti-theft systemsImmobilizer
The immobilizer prevents unauthorized
persons from starting your vehicle.
Activating
With the SmartKey
Remove the SmartKey from the starter
switch.
With KEYLESS-GO*

Press the KEYLESS-GO start / stop
button (
page 40) once.
The engine is turned off.

Open the driver’s door.Deactivating
With the SmartKey


Turn the SmartKey in the starter switch
to position2 (
page 38).
With KEYLESS-GO*


Switch on the ignition (
page 38).
Anti-theft alarm system
Once the alarm system has been armed, a
visual and audible alarm is triggered when
someone opens

a door


the tailgate


the hood
The alarm will stay on, even if the activat-
ing element (a door, for example) is imme-
diately closed.
The alarm system will also be triggered
when


the vehicle is raised, see “Tow-away
alarm” (
page 106)


the vehicle is opened with the mechan-
ical key, see “Unlocking the vehicle”
(page 459)


a door is opened from the inside, see
“Opening the doors from the inside”
(page 121)
iStarting the engine will also deactivate
the immobilizer.
In case the engine cannot be started
(yet the vehicle’s battery is charged),
the system is not operational. Contact
an authorized Mercedes-Benz Light
Truck Center or call
1-800-FOR-MERCedes (in the USA), or
1-800-387-0100 (in Canada).

105 Safety and Security
Anti-theft systems
Arming the alarm system
The alarm system is armed after you have
locked the vehicle with the SmartKey or
SmartKey with KEYLESS-GO*.
The alarm system indicator lamp is located
to the lower left of the hazard warning
flasher.1Alarm system indicator lamp

Make sure all doors and the tailgate are
closed.

Lock the vehicle (
page 67).
The turn signal lamps flash three times
to indicate that the vehicle is locked.
The alarm system is armed within ap-
proximately 10 seconds. Alarm system
indicator lamp 1 flashes.
iIf 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.
iIf the turn signal lamps do not flash
three times, one of the following ele-
ments may not be properly closed:

a door


the tailgate
Close the respective element and lock
the vehicle again.

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.

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.


114 Controls in detailLocking and unlockingUnlocking and opening the tailgate
You can unlock and open the tailgate sep-
arately.
A minimum height clearance of 7.2 ft
(2.20 m) is required to open the tailgate.
Press and hold buttonŠ on the
SmartKey until the tailgate unlocks and
begins to open.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 Light Truck
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 Light
Truck Center will be glad to supply you
with a replacement.
SmartKey with KEYLESS-GO*
Vehicles equipped with KEYLESS-GO come
with two SmartKeys with KEYLESS-GO,
each with remote control and a removable
mechanical key.
The locking tabs for the mechanical key
portion of the two SmartKeys with
KEYLESS-GO are a different color to help
distinguish each SmartKey with
KEYLESS-GO unit.
The function of the SmartKey overrules the
KEYLESS-GO function.
The KEYLESS-GO function is integrated
into the SmartKey. On these vehicles, the
validity of the SmartKey with KEYLESS-GO
is checked when you grasp an outside door
handle.
If the SmartKey with KEYLESS-GO is valid,
your vehicle unlocks

the doors


the tailgate


the fuel filler flap
!The tailgate swings open upwards auto-
matically. Always make sure there is
sufficient overhead clearance.
Vehicles with tailgate opening/closing
system*:
To stop the opening procedure, press
buttonŠ on the SmartKey. The tail-
gate stops moving.
iIf the vehicle was previously centrally
locked with the SmartKey, the tailgate
will lock automatically when closed.
The turn signals will flash three times to
confirm locking.

115 Controls in detail
Locking and unlocking
SmartKey with KEYLESS-GO*1‹ Lock button
2Š Unlock button* for tailgate
3Mechanical key locking tab
4ΠUnlock button
5Battery check lamp
6Â Panic button (
page 95)
Warning!
G
When leaving the vehicle, always take the
SmartKey with KEYLESS-GO* with you and
lock the vehicle. Do not leave children unat-
tended in the vehicle, or with access to an
unlocked vehicle. Unsupervised use of vehi-
cle equipment may cause an accident
and/or serious personal injury.!To prevent possible malfunction, avoid
exposing the SmartKey with
KEYLESS-GO to high levels of electro-
magnetic radiation.
iUSA 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 inter-
ference received, including interfer-
ence that may cause undesired
operation.
Any unauthorized modification to this
device could void the user’s authority
to operate the equipment.