76 Safety and Security
Occupant safety
Seat belts
The use of seat belts and infant and child
restraint systems is required by law in all
50 states, the District of Columbia, the
U.S. territories and all Canadian provinces.
Even where this is not the case, all vehicle
occupants should have their seat belts
fastened whenever the vehicle is in
motion.
For information on fastening seat belts,
see “Fastening the seat belts” (
page 48).
iFor information on infants and children
traveling with you in the vehicle and restraint
systems for infants and children, see “Children
in the vehicle” (
page 79).
Warning!G
Always fasten your seat belt before driving
off. Always make sure your passenger is
properly restrained.
Failure to wear and properly fasten and
position your seat belt greatly increases
your risk of injuries and their likely severity
in an accident. You and your passenger
should always wear seat belts.
If you are ever in an accident, your injuries
can be considerably more severe without
your seat belt properly buckled. Without
your seat belt buckled, you are much more
likely to hit the interior of the vehicle or be
ejected from it. You can be seriously injured
or killed.
In the same crash, the possibility of injury or
death is lessened if you are properly wearing
your seat belt. Air bags can only protect as
they are designed if the occupants are
properly wearing their seat belts.
Warning!G
Never ride in a moving vehicle with the seat
backrest in an excessively reclined position
as this can be dangerous. You could slide
under the seat belt in a collision. If you slide
under it, the seat belt would apply force at
the abdomen or neck. This could cause seri-
ous or even fatal injuries. The seat backrest
and seat belt provide the best restraint
when the wearer is in a position that is as
upright as possible and the seat belt is prop-
erly positioned on the body.
Warning!G
Never let more people ride in the vehicle
than there are seat belts available. Be sure
everyone riding in the vehicle is correctly
restrained with a separate seat belt. Never
use a seat belt for more than one person at
a time.
78 Safety and Security
Occupant safety
Enhanced seat belt reminder system
When the engine is started, the seat belt
telltale< will always illuminate
for 6 seconds to remind you and your
passenger to fasten your seat belts.
If the driver’s seat belt is not fastened
when the engine is started, an additional
warning chime will also sound for a maxi-
mum of 6 seconds or until the driver’s seat
belt is fastened.
If after these 6 seconds, the driver’s or the
passenger’s seat belt (with the passenger
seat occupied) are not fastened with both
doors closed,
the seat belt telltale< remains illu-
minated for as long as either the driv-
er’s or passenger’s seat belt is not
fastened.
and if the vehicle speed once exceeds
15 mph (25 km/h), the seat belt
telltale< starts flashing and a
warning chime sounds with increasing intensity for a maximum of 60 seconds
or until both the driver’s and
passenger’s seat belt are fastened.
If the driver’s or the passenger’s seat
belt remains unfastened after
60 seconds, the warning chime stops
sounding. The seat belt telltale<
stops flashing but continues to be
illuminated.
The seat belt telltale< will only go out
if both the driver’s and the passenger’s
seat belt (with the passenger seat occu-
pied) are fastened, or the vehicle is stand-
ing still and a door is opened.
For more information, see the “Practical
hints” section (
page 351).
Seat belts should not be worn twisted.
In a crash, you would not have the full
width of the seat belt to manage impact
forces. The twisted seat belt against
your body could cause injuries.
Pregnant women should also always use
a lap-shoulder belt. The lap belt portion
should be positioned as low as possible
on the hips to avoid any possible
pressure on the abdomen.
Never place your feet on the instrument
panel, dashboard or on the seat. Always
keep both feet on the floor in front of the
seat.
When using a seat belt to secure infant
or toddler restraints or children in
booster seats, always follow the child
seat manufacturer’s instructions.
79 Safety and Security
Occupant safety
Emergency tensioning device (ETD),
seat belt force limiter
The seat belts are equipped with
emergency tensioning devices and seat
belt force limiters.
The ETD is designed to activate in the
following cases:
in frontal or rear-end impacts exceed-
ing the system deployment threshold
if the restraint systems are operational
and functioning correctly, see
1indicator lamp (
page 64)
in certain vehicle rollovers if the sys-
tem determines an additional degree of
protectionWhen activated, emergency tensioning
devices remove slack from the seat belts in
such a way that the seat belts fit more
snugly against the body. Seat belt force
limiters reduce the force exerted by the
seat belts on occupants during a crash.
Children 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 the infant or child is
properly secured at all times while the
vehicle is in motion.
iThe ETDs will only activate if the seat belts
are fastened (latch plate properly inserted into
buckle).
Warning!G
An emergency tensioning device (ETD) that
was activated must be replaced.
When disposing of the emergency tension-
ing device, our safety instructions must be
followed. These are available at your
authorized Mercedes-Benz Center.
Warning!G
Do not leave children unattended in the
vehicle, even if they are secured in a child
restraint system. The children could
injure themselves on parts of the vehicle
be seriously or fatally injured through
excessive exposure to extreme heat or
cold
80 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.
The passenger lap-shoulder belt has a
special seat belt retractor for secure fas-
tening 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 seat 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 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.
Infants and small children should be
seated in an appropriate infant or child
restraint system which is properly secured
by a lap-shoulder belt and that complies
with U.S. Federal Motor Vehicle Safety
Standards 213 and 255 and Canadian
Motor Vehicle Safety Standards 213
and 210.2.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 compartment unless they are
firmly secured in place.
For more information, please refer to the
“Useful features” section (
page 252)
through (
page 254).
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.
81 Safety and Security
Occupant safety
A statement by the child restraint manu-
facturer of compliance with these stan-
dards can be found on the instruction label
on the restraint and in the instruction
manual provided with the restraint.
When using any infant, or toddler restraint,
or booster seat, be sure to carefully read
and follow all manufacturer’s instructions
for installation and use.
Please read and observe warning labels
affixed to inside of the vehicle and to infant
or child restraints.
Warning!G
Children 12 years old and under must be
seated and properly secured in an appropri-
ate infant or child restraint recommended
for the size and weight of the child.
The infant or child restraint must be properly
secured with the vehicle’s seat belt fully
in accordance with the child seat manufac-
turer’s instructions.
Occupants, especially children, should
never place their bodies or lean their heads
in the area of the door where the
head-thorax air bag inflates. This could
result in serious injuries or death should the
head-thorax air bag be triggered. Always sit
as upright as possible, properly use the seat
belt and use an appropriately sized infant
restraint, toddler restraint, or booster seat
recommended for the size and weight of
the child.
Children can be killed or seriously injured by
an inflating air bag. Note the following
important information when you place a
child in the passenger seat:
Your vehicle is equipped with air bag
technology designed to turn off the pas-
senger 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 appropriate
child restraint on the front passenger
seat.
A child in a rear-facing child restraint on
the passenger seat will be seriously
injured or even killed if the passenger
front air bag inflates in a collision which
could occur under some circumstances,
even with the air bag technology
installed in your vehicle.
If you install a rear-facing child restraint
on the passenger seat, make sure that
the 75indicator lamp is
illuminated, indicating that the passen-
ger front air bag is deactivated. Should
the 75 indicator lamp not
illuminate or go out while the restraint is
installed, please check installation.
Periodically check the 75
indicator lamp while driving to make
sure the 75indicator lamp
is illuminated. If the 75
indicator lamp goes out or remains out,
do not transport a child on the passen-
ger seat until the system has been
repaired. A child in a rear-facing child
restraint on the passenger seat will be
seriously injured or even killed if the
passenger front air bag inflates.
82 Safety and Security
Occupant safety
If you place a child in a forward-facing
child restraint on the passenger seat,
move the seat as far back as possible,
use the proper child restraint recom-
mended for the age, size and weight of
the child, and secure 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 passenger front
air bag may or may not be activated
(
page 72).
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/or the child is not properly secured in
the child restraint.
Warning!G
Children too big for a toddler restraint must
ride in seats using regular seat belts.
Position the shoulder belt across chest and
shoulder, not face or neck. A booster seat
may be necessary to achieve proper seat
belt positioning for children over 41 lbs until
they reach a height where a lap/shoulder
belt fits properly without a booster.
When the child restraint is not in use,
remove it from the vehicle or secure it with
the seat belt to prevent the child restraint
from becoming a projectile in the event of
an accident.
Do not leave children unattended in the
vehicle, even if the children are secured in a
child restraint system. Unsupervised
children in a child restraint system may use
vehicle equipment and may cause an
accident and/or serious personal injury.
107 Controls in detail
Memory function*
Memory function*
Prior to operating the vehicle, the driver
should check and adjust the seat height,
seat position fore and aft, and seat back-
rest angle if necessary, to ensure adequate
control, reach and comfort. The head re-
straint should also be adjusted for proper
height. See also the section on air bags
(
page 66) for proper seat positioning.
In addition, adjust the steering wheel to
ensure adequate control, reach, operation
and comfort. Both the interior and exterior
rear view mirrors should be adjusted for
adequate rear vision.
Fasten seat belts. Infants and small
children should be seated in an appropri-
ate infant or child restraint system which is
properly secured by a lap-shoulder belt
and that complies with U.S. Federal Motor
Vehicle Safety Standards 213 and 255
and Canadian Motor Vehicle Safety
Standards 213 and 210.2.With the memory function you can store up
to three different configurations.
Each store position on the driver’s side
includes the following settings:
Seat position
Steering wheel position
Exterior rear view mirrors’ position
Each store position on the passenger side
includes the following setting:
Seat positionThe memory button and memory position
switch are located on the outer side of
each seat.
1Memory buttonM
2Memory position switch
Switch on the ignition (page 37).
or
Open the respective door.
Warning!G
Do not activate the memory function while
driving. Activating the memory function
while driving could cause the driver to lose
control of the vehicle.
355 Practical hints
What to do if …
ProblemPossible cause/consequenceSuggested solution
75The front passenger front air bag
off indicator lamp does not illumi-
nate and/or does not remain illu-
minated with the weight of a
typical 12-month-old child in a
standard child restraint or less on
the passenger seat.The system is malfunctioning.Make sure there is nothing between
seat cushion and child seat and check
installation of the child seat.
Make sure that no objects applying
supplemental weight onto the seat are
present.
If the front passenger front air bag off
indicator lamp remains out, have the
system checked as soon as possible
by an authorized Mercedes-Benz
Center. Do not transport a child on the
passenger seat until the system has
been repaired.
Also read and observe any messages
in the multifunction display and follow
corrective steps (
page 361).
Warning!G
If the75indicator lamp does
not illuminate or remains out with the
weight of a typical 12-month-old child in a
standard child restraint or less on the
passenger seat, do not transport a child on
the passenger seat until the system has
been repaired.