2007 MERCEDES-BENZ E550 4MATIC Owner's Manual

80 Safety and SecurityOccupant safety
Self-test Occupant Classification Sys-
tem (USA only)
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 lamp
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 illumi-
nate 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).


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.
Warning!
G
If the 75 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.


81 Safety and Security
Occupant safety
BabySmart
TM air bag deactivation
system (Canada only)
175indicator lamp
Special BabySmart
TM compatible child
seats, designed for use with the
Mercedes-Benz system, are required for
use with the BabySmart
TM air bag deactiva-
tion system. Please contact your autho-
rized Mercedes-Benz Center for
information on availability. With the special
child seat properly installed, the front pas-
senger front air bag will not deploy.The 75indicator lamp locat-
ed in the center console will be illuminat-
ed, except with the SmartKey removed or
in starter switch position0.
Self-test BabySmart
TM without special
child seat installed (Canada only)
After turning the SmartKey in the starter
switch to position1 or2 or pressing the
KEYLESS-GO* start/stop button once or
twice, the 75indicator lamp
located in the center console comes on for
approximately 6 seconds and then goes
out.
If the 75indicator lamp
should not come on or is continuously lit,
the system is not functioning. You must
see an authorized Mercedes-Benz Center
before seating any child on the passenger
seat.
More information can be found in the
“Practical hints” section (page 395).
i
The system does not deactivate the side im-
pact air bag, the window curtain air bag and the
emergency tensioning device.
Warning!
G
The BabySmart
TM air bag deactivation sys-
tem will ONLY work with a special child seat
designed to operate with it. It will not work
with child seats which are not BabySmart
TM
compatible.
Never place anything between seat cushion
and child seat (e.g. pillow), since it reduces
the effectiveness of the deactivation sys-
tem. 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 protecting the child.
Follow the manufacturer’s instructions for
installation of special child seats.

82 Safety and SecurityOccupant 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 fas-
tened whenever the vehicle is in motion.
For more information, see “Fastening the
seat belts” (
page 49).
Warning!
G
When using a BabySmart
TM compatible child
seat on the front passenger seat, the front
passenger front air bag will not deploy only
if the 75indicator lamp re-
mains illuminated.
Please be sure to check the indicator every
time you use the special system child seat.
Should the indicator lamp go out while the
restraint is installed, please check installa-
tion. If the indicator lamp remains out, do
not use the BabySmart
TM restraint to trans-
port children on the front passenger seat un-
til the system has been repaired.
Warning!
G
Do not place powered-on laptops, cell
phones, electronic tags such as those used
in ski passes and like electronic devices on
the front passenger seat. Signals from such
devices may interfere with the BabySmart
TM
system. Such signal interference may cause
the 75indicator lamp not to
come on during self-test or be continuously
lit, indicating that the system is not function-
ing.
i
For information on infants and children trav-
eling with you in the vehicle and restraint sys-
tems for infants and children, see “Children in
the vehicle” (
page 88).

83 Safety and Security
Occupant safety
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 po-
sition your seat belt greatly increases your
risk of injuries and their likely severity in an
accident. You and your passengers 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 prop-
erly 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. That could cause se-
rious or even fatal injuries. The seat back-
rest and seat belt provide the best restraint
when the wearer is in a nearly upright posi-
tion and the seat belt is properly 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.
Warning!
G
Damaged seat belts or seat belts that were
highly stressed in an accident must be re-
placed and their anchoring points must also
be checked.
Only use seat belts which have been ap-
proved by Mercedes-Benz.
Do not make any modifications to the seat
belts. This can lead to unintended activation
or to failure.
Do not bleach or dye seat belts as this may
severely weaken them. In a crash they may
not be able to provide adequate protection.
Have all work carried out only by qualified
technicians. Contact an authorized
Mercedes-Benz Center.

84 Safety and SecurityOccupant safetyWarning!
G
USE SEAT BELTS PROPERLY

Seat belts can only work when used
properly. Never wear seat belts in any
other way than as described in this sec-
tion, as that could result in serious inju-
ries in case of an accident.


Each occupant should wear their seat
belt at all times, because seat belts help
reduce the likelihood of and potential
severity of injuries in accidents, includ-
ing rollovers. The integrated restraint
system includes SRS (driver front air
bag, front passenger front air bag, side
impact air bags, window curtain air bags
for side windows), ETD (seat belt emer-
gency tensioning device), and front seat
knee bolsters.
The system is designed to enhance the
protection offered to properly belted oc-
cupants in certain frontal (front air bags
and ETD) and side (side impact and win-
dow curtain air bags and ETD) impacts
which exceed preset deployment
thresholds and in certain rollovers (win-
dow curtain air bags and ETD).


Never wear the shoulder belt under your
arm, against your neck or off your shoul-
der. In a frontal crash, your body would
move too far forward. That would in-
crease the chance of head and neck in-
juries. The shoulder belt would also
apply too much force to the ribs or abdo-
men, which could severely injure inter-
nal organs such as your liver or spleen.


Never wear seat belts over rigid or
breakable objects in or on your clothing,
such as eyeglasses, pens, SmartKeys
etc., as these might cause injuries.


Position the lap belt as low as possible
on your hips and not across the abdo-
men. If the lap belt is positioned across
your abdomen, it could cause serious in-
juries in a crash.


Never use a seat belt for more than one
person at a time. Do not fasten a seat
belt around a person and another per-
son or other objects.


Seat belts should not be worn twisted.
In a crash, you wouldn’t have the full
width of the seat belt to distribute im-
pact forces. The twisted seat belt
against your body could cause injuries.

85 Safety and Security
Occupant safety
When the engine is started, the seat belt
telltale< will always illuminate
for 6 seconds to remind you and your pas-
sengers 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
front passenger’s seat belt (with the front
passenger seat occupied) is not fastened
with front doors closed,


the seat belt telltale< remains illu-
minated for as long as either the driv-
er’s or front passenger’s seat belt is not
fastened.
If you and/or your passenger release
the seat belt during driving, the seat
belt telltale< starts flashing and
the warning chime sounds.


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 the driver’s and the front pas-
senger’s seat belt are fastened.
If the driver’s or the front passenger’s
seat belt remains unfastened after
60 seconds, the warning chime stops
sounding, the seat belt telltale<
stops flashing but continues to be illu-
minated.After a vehicle standstill the warning
chime is reactivated and the seat belt
telltale< is flashing again if the ve-
hicle speed once exceeds 15 mph
(25 km/h).
The seat belt telltale < will only go out
if both the driver’s and front passenger’s
seat belt (with the front passenger seat oc-
cupied) are fastened, or the vehicle is
standing still and a front door is opened.
For more information, see “Practical hints”
(
page 388).
Emergency Tensioning Device (ETD),
seat belt force limiter
The seat belts for the front and rear outer
seats are equipped with emergency ten-
sioning devices and seat belt force limit-
ers.
The ETD is designed to activate in the fol-
lowing cases:


in frontal or rear-end impacts exceed-
ing the system deployment threshold


in certain vehicle rollovers


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 pres-
sure 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
restraint or toddler restraint or children
in booster seats, always follow the child
seat manufacturer’s instructions.

86 Safety and SecurityOccupant safety

if the restraint systems are operational
and functioning correctly,
see1indicator lamp (
page 68)
In an impact, emergency tensioning devic-
es remove slack from the seat belts. Seat
belt force limiters reduce the peak force
exerted by the seat belts on occupants
during a crash.Automatic comfort-fit feature seat belt
An automatic comfort-fit feature for front
seats reduces the retracting force of the
seat belts when they are in normal use.Preventive occupant safety
(PRE-SAFE
®)
Your vehicle automatically takes preven-
tive measures to better protect the occu-
pants in the following hazardous
situations:


You execute an emergency braking ma-
neuver and the Brake Assist System
(page 99) is activated.


The PRE-SAFE
® system detects a criti-
cal driving dynamics situation.
i
The ETDs for the front seats will only acti-
vate if the front seat belts are fastened (latch
plate properly inserted into buckle).
The ETDs for the rear outer seats will activate
with or without the respective seat belts fas-
tened.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 autho-
rized Mercedes-Benz Center.
Warning!
G
The PRE-SAFE
® system is intended to re-
duce the effects of a crash on properly
seat-belted vehicle occupants. Despite hav-
ing the PRE-SAFE® system in your vehicle,
the possibility of injuries occurring as a re-
sult of an accident cannot be eliminated.
Therefore, you should always drive carefully
and adjust your driving to the prevailing
road, weather, and traffic conditions.

87 Safety and Security
Occupant safety
In such cases, the following systems are
automatically activated:

The front seat belts are pre-tensioned
electrically.


If the vehicle is in a severe skid or is
spinning, the door windows and the
tilt/sliding sunroof close until a small
gap remains.
Vehicles with front passenger seat memo-
ry function*:


If the seat is in an unfavorable position,
it will be adjusted to a better position.If the seat belts do not release:

Adjust the backrest or seat slightly to
the rear until the seat belt tension is di-
minished.
The locking mechanism releases.
Active head restraints
The active head restraints are intended to
offer the driver and front passenger in-
creased protection from whiplash type in-
juries. 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.
i
If the closing procedure of the tilt/sliding
sunroof or door window is blocked, the tilt/slid-
ing sunroof or door window will stop and open
slightly.
i
The PRE-SAFE
® system is activated in the
previously described circumstances only at
speeds exceeding 20 mph (30 km/h).
When the critical driving dynamic situation has
passed without an accident occurring, the
pre-tensioning on the seat belts is deactivated.
You can then adjust the seat, the door windows
and the tilt/sliding sunroof to their previous po-
sition.
Warning!
G
Do not attach any objects (e.g. hangers) to
the head restraint posts. Otherwise, the ac-
tive head restraints may not function prop-
erly or offer the degree of protection they
were designed for in the event of a collision.