MERCEDES-BENZ R500 2006 W251 Owners Manual

90 Safety and SecurityOccupant safetySelf-test Occupant Classification Sys-
tem
After turning the SmartKey in the starter
switch to position1or2or pressing the
KEYLESS-GO* start / stop button once or
twice, the59indicator lamp
(page 89) located in the center console
illuminates. If an adult occupant is properly
sitting on the front passenger seat and the
system senses the occupant as being an
adult, the59indicator lamp
will illuminate and go out after approxi-
mately 6 seconds.
If the seat is not occupied and the system
senses the front passenger seat as being
empty, the59indicator lamp
will illuminate and not go out.For more information, see the “Practical
hints” section (
page 414).Installation of infant and child restraint
system
This vehicle is equipped with tether an-
chorages for a top tether strap at each of
the rear seat backrests.

Remove anchorage ring cover 1 from
seat backrest of the seat on which a
child seat is to be installed.
1Anchorage ring cover
Warning!
G
If the 59 indicator lamp should
not illuminate, the system is not functioning.
You must see an authorized Mercedes-Benz
Light Truck Center before seating any child
on the front passenger seat.Warning!
G
Never place anything between seat cushion
and child seat (e.g. pillow), since it reduces
the effectiveness of the Occupant Classifi-
cation System. The bottom of the child seat
must make full contact with the passenger
seat cushion. An incorrectly mounted child
seat could cause injuries to the child in case
of an accident, instead of increasing protec-
tion for the child.
Follow the manufacturer’s instructions for
installation of child seats.

91 Safety and Security
Occupant safety
2Anchorage rings
3Hook
Guide top tether strap between head
restraint and top of seat backrest.
Head restraint must be installed and
positioned such that the top tether
strap can pass freely between the head
restraint and top of seat backrest.

Make sure the tether strap is not twist-
ed.
2Anchorage ring
3Hook

Securely fasten hook3, which is part
of the tether strap, to anchorage
ring2.
iWhen installing a child seat and top
tether on a rear seat if a cargo compart-
ment cover blind* or a partition net* is
in place behind that rear seat, make
sure the top tether strap is positioned
between the seat backrest and the
cargo compartment cover blind* or
partition net* in order for the child seat
to be properly secured.
Warning!
G
When installing a child seat on a third-row
seat, do not fasten hook 3 to the strap be-
low anchorage ring 2. Otherwise, the child
seat will not be securely fastened. A child’s
risk of serious or fatal injuries is significantly
increased if the child seat is not properly se-
cured in the vehicle.iFor safety, make sure the hook has at-
tached to the ring beyond the safety
catch, as illustrated.


92 Safety and SecurityOccupant safetyOnce the top tether anchorage hook is
attached, the child restraint itself can be
secured. Tighten the top tether strap
according to the child restraint manufac-
turer’s instructions.Child seat anchors – LATCH type
This vehicle is equipped with two LATCH
(L
ower A
nchors and T
ethers for CH
ildren)
type anchors (at each of the rear seats) for
the installation of a LATCH child seat with
matching mounting fittings.
The LATCH anchors on the second-row
seats are covered with an upholstery
blend.
1Anchors second-row seats
2Indicates the position of the anchors

Remove anchorage ring covers 1 from
seat on which a child seat is to be in-
stalled.
3Anchorage ring covers, third-row seats
Warning!
G
Always lock backrest in its upright position
when rear seat bench is occupied by pas-
sengers, or the expanded cargo area is not
in use. Check for secure locking by pushing
and pulling on the backrest.


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.

94 Safety and SecurityOccupant safetyThe override switch is located on the
driver’s door control panel.
1Override switch
For more information on power windows,
see “Power windows” (
page 248).Disabling

Press override switch1 until it engag-
es.
The switch engages in the recessed po-
sition.
The rear door windows can no longer
be operated using the switches located
in the rear doors.Enabling

Press override switch1 once more.
The switch disengages from its re-
cessed position back to its original po-
sition.
The rear door windows can again be
operated using the switches located in
the rear doors.
iOperating the rear door windows using
the switches located on the door con-
trol panel of the driver’s door is still
possible.

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.

97 Safety and Security
Driving safety systems
Driving safety systems
In this section you will find information on
the following driving safety systems:

ABS (A
ntilock B
rake S
ystem)


BAS (B
rake A
ssist S
ystem)


ESP
® (E
lectronic S
tability P
rogram)


EBP (E
lectronic B
rake P
roportioning)


4-ETS (E
lectronic T
raction S
ystem)
ABS
The Antilock Brake System (ABS) regulates
the brake pressure so that the wheels do
not lock during braking. This allows you to
maintain the ability to steer your vehicle.
The ABS is functional above a speed of ap-
proximately 5 mph (8 km / h) independent
of road surface conditions.
On slippery road surfaces, the ABS will re-
spond even to light brake pressure.
The -indicator lamp in the instrument
cluster (
page 24) comes on when you
switch on the ignition. It goes out when the
engine is running.
Warning!
G
The following factors increase the risk of
accidents:

Excessive speed, especially in turns


Wet and slippery road surfaces


Following another vehicle too closely
The ABS, BAS, ESP
® and 4-ETS cannot re-
duce this risk.
Always adjust your driving style to the pre-
vailing road and weather conditions.
iIn winter operation, the maximum ef-
fectiveness of the ABS, the BAS, the
ESP
®, the EBP, and the 4-ETS is only
achieved with winter tires (
page 390)
or snow chains as required.
Warning!
G
Do not pump the brake pedal. Use firm,
steady brake pedal pressure instead. Pump-
ing the brake pedal defeats the purpose of
the ABS and significantly reduces braking
effectiveness.

98 Safety and SecurityDriving safety systemsBraking
At the instant one of the wheels is about to
lock up, a slight pulsation can be felt in the
brake pedal, indicating that the ABS is in
the regulating mode.
Keep firm and steady pressure on the
brake pedal while experiencing the pul-
sation.
Continuous, steady brake pedal pressure
yields the advantages provided by the ABS,
namely braking power and ability to steer
the vehicle.
The pulsating brake pedal can be an
indication of hazardous road conditions
and functions as a reminder to take extra
care while driving.Emergency brake maneuver

Keep continuous full pressure on the
brake pedal.
For more information, see the “Practical
Hints” section (
page 404).
Warning!
G
When the ABS is malfunctioning, the BAS,
the ESP
®, and the 4-ETS are also switched
off. The basic driving and braking functions
are still available
When the ABS is malfunctioning, the wheels
may lock during hard braking, reducing
steering capability and extending the brak-
ing distance.
Warning!
G
The ABS cannot prevent the natural laws of
physics from acting on the vehicle, nor can
it increase braking or steering efficiency be-
yond that afforded by the condition of the
vehicle brakes and tires or the traction
afforded. The ABS cannot prevent acci-
dents, including those resulting from exces-
sive speed in turns, following another
vehicle too closely, or hydroplaning. Only a
safe, attentive, and skillful driver can pre-
vent accidents. The capabilities of an ABS
equipped vehicle must never be exploited in
a reckless or dangerous manner which
could jeopardize the user’s safety or the
safety of others.

99 Safety and Security
Driving safety systems
BAS
The Brake Assist System (BAS) operates in
emergency situations. If you apply the
brakes very quickly, the BAS automatically
provides full brake boost, thereby poten-
tially reducing braking distance. Apply con-
tinuous full braking pressure until the
emergency braking situation is over. The
ABS will prevent the wheels from locking.
When you release the brake pedal, the
brakes function again as normal. The BAS
is then deactivated.
ESP
®
The Electronic Stability Program (ESP
®) is
operational as soon as the engine is run-
ning and monitors the vehicle’s traction
(force of adhesive friction between the
tires and the road surface) and handling.
The ESP
® recognizes when a wheel is
spinning or if the vehicle starts to skid. By
applying brakes to the appropriate wheel
and by limiting engine output, the ESP
®
helps stabilize the vehicle. The ESP
® is es-
pecially useful while driving off and on wet
or slippery road surfaces. The ESP® also
stabilizes the vehicle during braking ma-
neuvers.
The ESP
® warning lampv in the instru-
ment cluster (
page 24) flashes when the
ESP
® is engaged.
The ESP
® warning lampv in the instru-
ment cluster comes on when you switch on
the ignition. It goes out when the engine is
running.
Warning!
G
If the BAS is malfunctioning, the brake sys-
tem is still functioning, but without the addi-
tional brake boost available that BAS would
normally provide in an emergency braking
maneuver. Therefore, the braking distance
may increase.
Warning!
G
The BAS cannot prevent the natural laws of
physics from acting on the vehicle, nor can
it increase braking efficiency beyond that
afforded by the condition of the vehicle
brakes and tires or the traction afforded.
The BAS cannot prevent accidents, includ-
ing those resulting from excessive speed in
turns, following another vehicle too closely,
or hydroplaning. Only a safe, attentive, and
skillful driver can prevent accidents. The
capabilities of a BAS equipped vehicle must
never be exploited in a reckless or danger-
ous manner which could jeopardize the
user’s safety or the safety of others.