77 Safety and Security
Occupant safety
Active head restraints
The active head restraints are intended to
offer the driver and front passenger in-
creased protection from head and neck in-
jury. In the event of a rear-end collision,
the active head restraints on the driver’s
and front passenger’s seats are designed
to move forward in the direction of travel,
providing the head with increased support
earlier on in the collision sequence. The ac-
tive head restraints move forward whether
the seat is occupied or not.You cannot remove the active head re-
straint on the driver’s and passenger’s
seats.
For removal of the active head restraints
we recommend that you contact an autho-
rized Mercedes-Benz Center.
For information on reseting the activated
active head restraints, see “Resetting acti-
vated head restraints” (
page 430).
For information on head restraint adjust-
ment, see “Seats” (
page 40).
Warning!
G
Only use seat or head restraint covers which
have been tested and approved by
Mercedes-Benz for your vehicle model. Us-
ing other seat or head restraint covers may
interfere with or prevent the activation of
the active head restraints. Contact your au-
thorized Mercedes-Benz Center for availabil-
ity.
Warning!
G
For your protection, drive only with properly
positioned head restraints.
Adjust head restraint so that the center of
the head restraint supports the back of the
head at eye level. This will reduce the poten-
tial for injury to the head and neck in the
event of an accident or similar situation.
Do not drive the vehicle without the seat
head restraints. Head restraints are intend-
ed to help reduce injuries during an acci-
dent.
78 Safety and SecurityOccupant safetyChildren in the vehicle
If an infant or child is traveling with you in
the vehicle:
Secure the child using an infant or child
restraint appropriate to the age and
size of the child.
Make sure that the infant or child is
properly secured at all times while the
vehicle is in motion.
Infant and child restraint seats and
information on choosing an appropriate
restraint system can be obtained from any
Mercedes-Benz Center.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. The seat
belt can again be used in the usual man-
ner.
iInformation on child seats with mount-
ing fittings for tether anchorages
(page 86).
For information on LATCH-type child
seat mounts (
page 88).
!The use of infant or child restraints is
required by law in all 50 states, the Dis-
trict of Columbia, the U.S. territories
and all Canadian provinces.
Infants and small children should be
seated in an appropriate infant or child
restraint system properly secured by a
lap/shoulder belt or, if so equipped, a
top tether anchorage point and a child
restraint lower anchorage system that
complies with U.S. Federal Motor Vehi-
cle Safety Standards 213 and 225 and
Canadian Motor Vehicle Safety Stan-
dards 213 and 210.2.
79 Safety and Security
Occupant safety
Warning!
G
Never release the seat belt buckle while the
vehicle is in motion, since the special seat
belt retractor will be deactivated.!A statement by the child restraint
manufacturer of compliance with this
standard can be found on the
instruction label on the restraint and in
the instruction manual provided with
the restraint.
When using any infant or child restraint
system, be sure to carefully read and
follow all manufacturer’s instructions
for installation and use.
Please read and observe warning labels
affixed to the inside of the vehicle and
to infant or child restraints.
Warning!
G
According to accident statistics, children
are safer when properly restrained in the
rear seating positions than in the front seat-
ing position. Thus, we strongly recommend
that children be placed in the rear seats
whenever possible. Regardless of seating
position, children 12 years old and under
must be seated and properly secured in an
appropriate infant or child restraint recom-
mended for the size and weight of the child.
The infant or child restraint must be properly
secured with the vehicle’s seat belt, the seat
belt and top tether strap, or lower anchors
and top tether strap, fully in accordance
with the child seat manufacturer’s instruc-
tions.
Children can be killed or seriously injured by
an inflating air bag. Note the following im-
portant information when circumstances re-
quire you to place a child in the front
passenger seat:
Your vehicle is equipped with air bag
technology designed to turn off the front
passenger front air bag in your vehicle
when the OCS senses the weight of a
typical 12-month-old child or less along
with the weight of a standard appropri-
ate child restraint on the front passen-
ger seat.
A child in a rear-facing child restraint on
the front passenger seat will be serious-
ly injured or even killed if the front pas-
senger front air bag inflates in a collision
which could occur under some circum-
stances, even with the air bag technolo-
gy installed in your vehicle. The only
means to completely eliminate this risk
is to never place a child in a rear-facing
child restraint in the front seat. We
therefore strongly recommend that you
always place a child in a rear-facing
child restraint in the back seat.
80 Safety and SecurityOccupant safety
If you must install a rear-facing child re-
straint on the front passenger seat be-
cause circumstances require you to do
so, make sure that the
75indicator lamp is illuminat-
ed, indicating that the front passenger
air bag is deactivated. Should the light
not illuminate or go out while the re-
straint is installed, please check installa-
tion. Periodically check the indicator
lamp while driving to make sure the
lamp is illuminated. If the
75indicator lamp goes out or
remains out, do not transport a child on
the front passenger seat until the sys-
tem has been repaired. A child in a
rear-facing child restraint on the front
passenger seat will be seriously injured
or even killed if the front passenger front
air bag inflates.
If you have to place a child in a
forward-facing child restraint on the
front passenger seat, move the seat as
far back as possible, use the proper
child restraint recommended for the
age, size and weight of the child, and se-
cure child restraint with the vehicle’s
seat belt according to the child seat
manufacturer’s instructions. For
children larger than the typical
12-month-old child, the front passenger
air bag may or may not be activated
(page 82).
Warning!
G
Infants and small children should never
share a seat belt with another occupant.
During an accident, they could be crushed
between the occupant and seat belt.
A child’s risk of serious or fatal injuries is
significantly increased if the child restraints
are not properly secured in the vehicle and
the child is not properly secured in the child
restraint.
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 proper-
ly without a booster.
83 Safety and Security
Occupant safety
If the 75 indicator lamp is illumi-
nated, the front passenger front air bag is
deactivated and will not be deployed.
If the 75 indicator lamp is not illu-
minated, the front passenger front air bag is
activated and will be deployed:
in the event of certain frontal impacts
if impact exceeds a preset deployment
threshold
independently of the side impact
air bags.
If the front passenger front air bag is
deployed, the rate of inflation will be
influenced by:
the rate of relevant vehicle deceleration
as assessed by the air bag control unit
front passenger’s weight category as
identified by the Occupant Classification
System (OCS).
Warning!
G
According to accident statistics, children
are safer when properly restrained in the
rear seating positions than in the front seat-
ing position. Thus, we strongly recommend
that children be placed in the rear seats
whenever possible. Regardless of seating
position, children 12 years old and under
must be seated and properly secured in an
appropriate infant or child restraint recom-
mended for the size and weight of the child.
The infant or child restraint must be properly
secured with the vehicle’s seat belt, the seat
belt and top tether strap, or lower anchors
and top tether strap, fully in accordance
with the child seat manufacturer’s instruc-
tions.
Children can be killed or seriously injured by
an inflating air bag. Note the following im-
portant information when circumstances re-
quire you to place a child in the front
passenger seat:
Your vehicle is equipped with air bag
technology designed to turn off the front
passenger front air bag in your vehicle
when the system senses the weight of a
typical 12-month-old child or less along
with the weight of a standard appropri-
ate child restraint on the front passen-
ger seat.
A child in a rear-facing child restraint on
the front passenger seat will be serious-
ly injured or even killed if the front pas-
senger front air bag inflates in a collision
which could occur under some circum-
stances, even with the air bag technolo-
gy installed in your vehicle. The only
means to completely eliminate this risk
is to never place a child in a rear-facing
child restraint in the front seat. We
therefore strongly recommend that you
always place a child in a rear-facing
child restraint in the back seat.
85 Safety and Security
Occupant safety
The 75 indicator lamp is located
in the center console.
1Indicator lampThe 75 indicator lamp1 will be
illuminated, except with the SmartKey re-
moved or in starter switch position0.
that the seat was occupied by a
small individual (such as a young
teenager or a small adult) or a child
weighing more than the weight of a
typical 12-month-old child in a stan-
dard child restraint - instances
where the system may suppress de-
ployment of the passenger front
air bag even though the impact met
the criteria and was of sufficient se-
verity to deploy the driver front
air bag.
Warning!
G
If the 1indicator lamp and the
75 indicator lamp are lit at the
same time, there is a malfunction in the
Occupant Classification System. The front
passenger front air bag will be deactivated
in this case.
In order to ensure proper operation of the
air bag system and OCS:
Have the system checked as soon as
possible by qualified technicians.
Contact an authorized Mercedes-Benz
Center.
Do not place more than 4.4 lbs (2 kg)
into the ruffled storage bag on the back
of the front passenger seat. Otherwise,
the OCS may not be able to properly ap-
proximate the occupant weight
category.
Do not place objects under and/or
around the front passenger seat.
Do not hang anything from or attach any
items to the seats.
Do not stuff objects such as books be-
tween the middle console and the front
passenger seat.
Do not move the front passenger seat
backwards against stiff objects.
Sit properly belted in a nearly upright
position with your back against the seat
backrest.
Do not lean on the armrests or lift your-
self from the seat by using the handle
over the door as this may cause the OCS
to be unable to correctly approximate
the occupant weight category.
Only have the seat repaired or replaced
by an authorized Mercedes-Benz
Center.
Read and observe all warnings in this
chapter.
86 Safety and SecurityOccupant safetySelf-test Occupant Classification Sys-
tem
After turning the SmartKey in the starter
switch to position1 or2 or pressing the
KEYLESS-GO* start/stop button once or
twice, the 75 indicator lamp1
located in the center console illuminates. If
an adult occupant is properly sitting on the
front passenger seat and the system sens-
es the occupant as being an adult, the
75 indicator lamp will illuminate
and go out after approximately 6 seconds.
If the seat is not occupied and the system
senses the front passenger seat as being
empty, the 75 indicator lamp will
illuminate and not go out. For more information, see the “Practical
hints” section (
page 393).Installation of infant and child restraint
systems
This vehicle is equipped with tether an-
chorages for a top tether strap at each of
the rear seating positions.
Not foldable rear seat backrest
1Cover
Remove cover1 from anchorage ring.
Guide tether strap between head re-
straint and top of the seat back.
Warning!
G
If the indicator lamp should not illuminate,
the system is not functioning. You must see
an authorized Mercedes-Benz 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.
88 Safety and SecurityOccupant safety2Hook
3Anchorage ring
Swing rear seat backrest to the rear un-
til it engages.
Check the rear seat backrest to be
locked in its upright position
(page 399).
Once the top tether anchorage hook is
attached, the child restraint itself can be
secured. Secure the child restraint and
tighten the top tether strap according to
the child restraint manufacturer’s instruc-
tions. 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 outer rear
seats) for the installation of a “LATCH”
child seat with the matching mounting fit-
tings.
The anchors are located behind an uphol-
stery blend.
1Indicates the position of the anchors
2Anchors
Lift up upholstery blend to access the
anchors.
Install child seat according to the
manufacturer’s instructions.