2008 MERCEDES-BENZ R320 child lock

67 Getting started
Parking and locking
If you have started the engine with the
KEYLESS-GO start/stop button and
cannot turn it off as described above:
Remove the KEYLESS-GO start/stop
button from the starter switch.
Insert the SmartKey with KEYLESS-GO
into the starter switch.
The engine turns off. The starter switch
is in position0 (
page 40).
Releasing seat belts
Press the seat belt release button
(
page 51).
Allow the retractor to completely
rewind the seat belt by guiding the
latch plate.
Locking
!Make sure the seat belt retracts fully so that
the seat belt and/or latch plate cannot get
caught or pinched in the door or in the seat
mechanism. This can damage the seat belt and
impair the effectiveness of the seat belt, and/or
cause damage to the door and/or door trim
panel. Such damage is not covered by the
Mercedes-Benz Limited Warranty.
Damaged seat belts must be replaced.
Contact an authorized Mercedes-Benz Light
Truck Center.
Warning!G
To prevent possible personal injury, always
keep hands and fingers away from the door
openings when closing the doors.
Be especially careful when small children
are around.
Before closing doors, make sure there is no
possibility of someone getting caught in a
door during closing.
Warning!G
When leaving the vehicle, always remove the
SmartKey from the starter switch, take the
SmartKey with KEYLESS-GO* with you, and
lock your vehicle. Do not leave children
unattended in the vehicle, or with access to
an unlocked vehicle. A child’s unsupervised
access to a vehicle could result in an
accident and/or serious personal injury.

88 Safety and Security
Occupant safety
Infant and child restraint systems
We recommend all infants and children be
properly restrained at all times while the
vehicle is in motion.
All lap-shoulder belts except the driver’s
seat belt have special seat belt retractors
for secure fastening of child restraints.
To fasten a child restraint, follow child
restraint instructions for mounting. Then
pull the shoulder belt out completely and
let it retract. During seat belt retraction, a
ratcheting sound can be heard to indicate
that the special seat belt retractor is acti-
vated. The belt is now locked. Push down
on child restraint to take up any slack.
To deactivate, release seat belt buckle and
let seat belt retract completely. To deacti-
vate the special seat belt retractor for the
front passenger seat, the front passenger
seat must be in the most backward posi-
tion. The seat belt can again be used in the
usual manner.The use of infant or child restraints is re-
quired by law in all 50 states, the District
of Columbia, the U.S. territories and all
Canadian provinces.Do not expose the child restraint system to
direct sunlight. The child restraint system’s
metal parts, for example, could become very
hot, and the child could be burned on these
parts.
If children open a door, they could

injure other persons

get out of the car and injure themselves
or be injured by following traffic
Do not carry heavy or hard objects in the
passenger or cargo compartment unless
they are firmly secured in place. For more in-
formation, please refer to the “Loading”
(
page 288) and “Useful features”
(
page 304) sections in the “Controls in
detail” chapter.
Unsecured or improperly positioned cargo
increases a child’s risk of injury in the
event of:

strong braking maneuvers

sudden changes of direction

an accident
Warning!G
Never release the seat belt buckle while the
vehicle is in motion, since the special seat
belt retractor will be deactivated.
iFor information on child seats with mounting
fittings for tether anchorages, see “Installation
of infant and child restraint system”
(
page 92).
For information on LATCH type child seat
mounts, see “Child seat anchors – LATCH type”
(
page 91).


93 Safety and Security
Occupant safety
2Anchorage ring
3Hook
4Top tether strap
Guide top tether strap4 between
head restraint and top of seat backrest.
Securely fasten hook3, which is part
of top tether strap4, to anchorage
ring2.
Make sure

the top tether strap is not twisted

the head restraint is installed and
positioned such that the top tether
strap* can pass freely between the
head restraint and top of seat back-
rest

the top tether strap is positioned
between the seat backrest and the
cargo compartment cover blind
(if installed)

the top tether strap is positioned
between the seat backrest and the
cargo net* (if installed)
Fold seat backrest up and push back-
wards until it audibly engages.
An outboard second-row seat is prop-
erly locked only when lock status indi-
cator 1 is in hinged position and red
marking 2 is barely visible
(
page 131).
iFor safety, make sure hook 3 has attached
to anchorage ring 2 beyond the safety catch, as
illustrated.
Warning!G
When installing a child seat on a third-row
seat, do not fasten hook 3 to the strap
below 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 secured in the vehicle.


94 Safety and Security
Occupant safety
Lower the head restraint if necessary
(
page 135).
Make sure the top tether strap can
pass freely between the head restraint
and top of seat backrest.
Install the child restraint system and
tighten the top tether strap according
to the child restraint manufacturer’s
instructions.Second-row middle seat*
Warning!G
After installing top tether straps, make sure

the seats are properly locked

the seat backrests are in an upright po-
sition and are properly locked
An outboard second-row seat is properly
locked only when lock status indicator 1 is
in hinged position and red marking 2 is
barely visible (
page 131).
If a seat and seat backrest are not properly
locked, the seat could move forward and the
seat backrest could fold. The child seat
would no longer be properly supported or
positioned to provide its intended benefit.
That could cause serious or even fatal
injuries.
Warning!G
Only install a child seat in the second-row
middle seat position if the outboard seat
belt buckle is not obstructed or overlapped
by the child seat. Not all child seats, includ-
ing some Mercedes-Benz approved child
seats, can be used in this seating position.
Contact an authorized Mercedes-Benz Light
Truck Center for more information.
Do not use the LATCH anchors or seat belt
buckle for the outboard seats in conjunction
with a child seat the second-row middle seat
position. Child seats in the middle seating
position must only be secured by the middle
seat position seat belt inserted into the seat
belt receptacle for that seat.


96 Safety and Security
Occupant safety
4Anchorage ring
5Hook
6Top tether strap
Guide top tether strap6 between
head restraint and top of seat backrest.
Securely fasten hook5, which is part
of top tether strap6, to anchorage
ring4.
Make sure

the top tether strap is not twisted

the head restraint is installed and
positioned such that the top tether
strap can pass freely between the
head restraint and top of seat back-
rest

the top tether strap is positioned
between the seat backrest and the
cargo compartment cover blind
(if installed)

the top tether strap is positioned
between the seat backrest and the
cargo net* (if installed)
Fold seat backrest up and push back-
wards until it audibly engages.
Lower the head restraint if necessary
(
page 135).
Make sure the top tether strap can
pass freely between the head restraint
and top of seat backrest.
Install the child restraint system and
tighten the top tether strap according
to the child restraint manufacturer’s
instructions.
iFor safety, make sure hook 5 has attached
to anchorage ring 4 beyond the safety catch as
illustrated.
Warning!G
After installing top tether strap, make sure
the seat backrest is in an upright position
and is properly locked.
If the seat backrest is not properly locked,
the seat backrest could fold. The child seat
would no longer be properly supported or
positioned to provide its intended benefit.
That could cause serious or even fatal
injuries.


97 Safety and Security
Occupant safety
Blocking of rear door window operation
With the override switch you can disable
the rear side window switches in the rear
door panels.The override switch is located on the
driver’s door control panel.
1Override switch
For more information on power windows,
see “Power windows” (
page 241).Disabling
Press override switch1 until it
engages.
The switch engages in the recessed
position.
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.
Warning!G
Activate the override switch when children
are riding in the back seats of the vehicle.
The children could otherwise injure them-
selves, e.g. by becoming trapped in the
window 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. A child’s unsupervised
access to a vehicle could result in an
accident and/or serious personal injury.
iOperating the rear door windows using the
switches located on the door control panel of the
driver’s door is still possible.

111 Controls in detail
Locking and unlocking
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 personal injury.
!To prevent possible malfunction, avoid ex-
posing the SmartKey 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 interference
received, including interference 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 interference
received, including interference that may
cause undesired operation of the device.
Any unauthorized modification to this device
could void the user’s authority to operate the
equipment.
iYou can also open and close

the door windows

the hinged quarter windows*

the tilt/sliding sunroof*

the tilt/sliding panel*
using the SmartKey, see “Summer opening
feature” (
page 244) and “Convenience clos-
ing feature” (
page 245).
!If you cannot lock or unlock the vehicle with
the SmartKey, the batteries 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 479).

Use the mechanical key to unlock the
driver’s door (
page 474).

Lock the vehicle as described in the
“Practical hints” section (
page 475).

Have the vehicle battery and the vehicle
battery connections checked (
page 503).
If the SmartKey is malfunctioning, contact
Roadside Assistance or an authorized
Mercedes-Benz Light Truck Center.

114 Controls in detail
Locking and unlocking
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. A child’s unsupervised
access to a vehicle could result in an
accident and/or serious personal injury.
!To prevent possible malfunction, avoid
exposing the SmartKey with KEYLESS-GO to high
levels of electromagnetic 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 interfer-
ence, and
(2) this device must accept any interference
received, including interference 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 interference
received, including interference that may
cause undesired operation of the device.
Any unauthorized modification to this device
could void the user’s authority to operate the
equipment.
iYou can also open and close

the door windows

the hinged quarter windows*

the tilt/sliding sunroof*

the tilt/sliding panel*
using the SmartKey with KEYLESS-GO, see
“Summer opening feature” (
page 244) and
“Convenience closing feature” (
page 245).
!If you cannot lock or unlock the vehicle with
the SmartKey with KEYLESS-GO, the batteries in
the SmartKey with KEYLESS-GO are discharged,
the SmartKey with KEYLESS-GO is malfunction-
ing, or the vehicle battery is drained.

Check the batteries in the SmartKey with
KEYLESS-GO (
page 118) and replace
them if necessary (
page 479).

Use the mechanical key to unlock the
drivers’ door (
page 474).

Lock the vehicle as described in the
“Practical hints” section (
page 475).

Have the vehicle battery and the vehicle bat-
tery connections checked (
page 503).
If the SmartKey with KEYLESS-GO is malfunc-
tioning, contact Roadside Assistance or an
authorized Mercedes-Benz Light Truck Center.