ECU MERCEDES-BENZ S550 2007 W221 Owner's Guide

60 Safety and SecurityOccupant safetyPreventive occupant safety (PRE-SAFE
®)
Your vehicle automatically takes preven-
tive measures to better protect the occu-
pants in the following hazardous
situations.PRE-SAFE
® takes action in the following in-
stances:


Emergency braking situations, e.g.
when BAS (
page 71) is activated or
when
BAS Plus* (page 71) is strongly inter-
vening.


Critical dynamic driving situations, e.g.
when the vehicle is understeering or
oversteering because it has exceeded
its physical limitations.


Evasive steering maneuvers at speeds
above 19 mph (30 km/h).
When you are driving faster than 19 mph
(30 km/h), PRE-SAFE
® takes the following
measures in such situations:


The front seat belts are pre-tensioned
electrically.


If the OCS senses that the front pas-
senger seat is occupied and the seat is
in an unfavorable position, it will be
adjusted to a better position.


If the vehicle is equipped with power
adjustable rear seats* and the passen-
ger outer seats are in an unfavorable
position, they will be adjusted to a bet-
ter position.


It increases the air pressure in the air
pockets (on the sides of the seat cush-
ion and backrest) of the multicontour*
and/or drive-dynamic front seats*.


If the vehicle is understeering or over-
steering, the tilt/sliding sunroof and
the side windows also close until only a
small gap remains.
Once the hazardous situation is over with-
out an accident occurring, PRE-SAFE
®
loosens the belt pre-tension and decreas-
es the air pressure in the air pockets of the
multicontour and drive-dynamic seats*.
You can readjust all of the settings made
by PRE-SAFE
®.
Warning!
G
The PRE-SAFE
® system is intended to re-
duce the effects of an accident on properly
seat-belted vehicle occupants. Despite
having the PRE-SAFE
® system in your vehi-
cle, the possibility of injuries occurring as a
result of an accident cannot be eliminated.
Therefore, you should always drive carefully
and adjust your driving to the prevailing
road, weather, and traffic conditions.
i
If the closing procedure of the tilt/sliding
sunroof or door windows is blocked, the tilt/slid-
ing sunroof or door windows will stop and open
slightly.

61 Safety and Security
Occupant safety
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.
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.
!
When moving the seat, make sure there are
no items in the footwell or behind the seats. Oth-
erwise you could damage the seats.
Warning!
G
Do not leave children unattended in the ve-
hicle, even if they are secured in a child re-
straint system. The children could

injure themselves on parts of the vehicle


be seriously or fatally injured through
excessive exposure to extreme heat or
cold
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 or trunk unless
they are firmly secured in place. For more in-
formation, see “Loading and storing”
(
page 447) section of the “Controls in de-
tail” 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

62 Safety and SecurityOccupant safetyInfant 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.
Warning!
G
Never release the seat belt buckle while the
vehicle is in motion, since the special seat
belt retractor will be deactivated.i
Information on child seats with mounting fit-
tings for tether anchorages (
page 64).
For information on LATCH-type child seat
mounts (
page 65).
!
The use of infant or child restraints is re-
quired by law in all 50 states, the District of Co-
lumbia, the U.S. territories and all Canadian
provinces.
Infants and small children should be seated in an
appropriate infant or child restraint system prop-
erly 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 Vehicle Safety
Standards 213 and 225 and Canadian Motor Ve-
hicle Safety Standard 213 and 210.2.
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 re-
straint.
When using any infant or child restraint system,
make sure to carefully read and follow all manu-
facturer’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 toddler restraint, or
booster seat recommended for the size and
weight of the child.

63 Safety and Security
Occupant safety
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
instructions.
Always sit nearly upright, properly use the
seat belts and use an appropriately sized in-
fant or toddler restraint or booster seat rec-
ommended for the size and weight of the
child.
Children can be killed or seriously injured by
an inflating air bag. Note the following im-
portant information when circumstances
require 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
appropriate child restraint on the front
passenger 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
passenger front air bag inflates in a
collision which could occur under some
circumstances, even with the air bag
technology 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.


If you must install a rear-facing child
restraint on the front passenger seat be-
cause circumstances require you to do
so, make sure that the 59
indicator lamp is illuminated, indicating
that the front passenger front air bag is
deactivated. Should the
59indicator lamp not illu-
minate or go out while the restraint is in-
stalled, please check installation.
Periodically check the 59
indicator lamp while driving to make
sure the lamp is illuminated.
If the 59indicator lamp
goes out or remains out, do not trans-
port a child on the front passenger seat
until the system has been repaired.
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.


If you have to place a child in a for-
ward-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 secure child
restraint with the vehicle’s seat belt ac-
cording to the child seat manufacturer’s
instructions. For children larger than the
typical 12-month-old child, the front
passenger front air bag may or may not
be activated (
page 51).

64 Safety and SecurityOccupant safety
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.
1Cover of top anchorage ring
Bring the rear power seat backrest* to
a fully upright position (
page 320).

Remove cover1 from anchorage ring.

Store cover1 in a convenient place
(e.g. glove box).

Guide tether strap between head re-
straint and top of seat back.
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.
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 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 chil-
dren in a child restraint system may use
vehicle equipment and may cause an acci-
dent and/or serious personal injury.

65 Safety and Security
Occupant safety
Head restraints must be positioned such
that the top tether strap can pass freely
between the head restraint and top of seat
back.
Make sure the tether strap is not twist-
ed.
2Hook
3Anchorage ring

Securely fasten hook2, which is part
of the tether strap, to anchorage
ring3.Once the top tether anchorage hook is at-
tached, the child restraint itself can be se-
cured. Tighten the top tether strap
according to the child restraint manufac-
turer’s instructions.

Reinstall cover after removing the
tether strap.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
the matching anchor fittings.
If you have not installed a child seat, the
LATCH anchor are covered with an uphol-
stery blend.
1Indicates the position of the anchors
2Anchors
3Upholstery blend
4Installation device
i
For safety reasons, make sure hook2 has
attached to ring3 beyond the safety catch, as
illustrated.
Warning!
G
Vehicles with adjustable rear seats/bench*:
Never adjust the rear seat position after in-
stalling the child restraint. Adjusting the rear
seat position after installing the child re-
straint could damage the child restraint
and/or introduce undesirable slack or ten-
sion into the seat belt and loosen or mispo-
sition the child restraint, lessening the
effectiveness of the child restraint and thus
i n c r e a s i n g t h e c h a n c e o r s e v e r i t y o f i n j u r y i n
an accident.


66 Safety and SecurityOccupant safety
Bring the rear power seat backrest* to
its fully upright position (
page 320).

Fold upholstery blend3 upward.

Turn installation device4 to a vertical
position so that upholstery blend3
does not fold down.

Install child seat according to the man-
ufacturer’s instructions.
A rigid connection is established be-
tween the child seat and the body of
the vehicle.
Do not adjust rear power seat*/bench*
position after installing child restraint.
Warning!
G
Vehicles with adjustable rear seats/bench*:
Never adjust the rear seat position after in-
stalling the child restraint. Adjusting the rear
seat position after installing the child re-
straint could damage the child restraint
and/or introduce undesirable slack or ten-
sion into the seat belt and loosen or mispo-
sition the child restraint, lessening the
effectiveness of the child restraint and thus
i n c r e a s i n g t h e c h a n c e o r s e v e r i t y o f i n j u r y i n
an accident.i
The child seat must be firmly attached in the
right and left side anchor fittings.
Make sure the seat belt for the center seat can
operate freely with a child seat installed.
Non-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 manu-
facturer’s instructions.
Warning!
G
Children too big for a toddler restraint must
ride in seats using regular seat belts. Posi-
tion. Position shoulder belt across chest and
shoulder, not face or neck. A booster seat
may be necessary to achieve proper belt po-
sitioning for children over 41 lbs until they
reach a height where a lap/shoulder belt fits
properly without a booster.
Install child seat according to manufactur-
er’s instructions.
The child seat must be firmly attached in
right and left side anchors2.
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.


67 Safety and Security
Occupant safety
Override switch for rear passenger compartment
You can disable select functions in the rear
passenger compartment for added safety
(for instance when you have children riding
in the rear passenger compartment).
You can disable the following functions in
the rear passenger compartment:

rear door window operation
(page 353)


adjustment of front passenger seat
from the rear* (
page 320)


rear center console lighter
(page 458)


sunblinds for panorama roof*
(page 443)


rear window sunshade (
page 456)
and rear side window sunshades
(
page 355)The override switch is located on the driv-
er’s door.
1Override switch
2Indicator lamp

Activating: Press switch 1.
Indicator lamp2 comes on. The func-
tions in the rear are disabled.

Deactivating: Press switch 1 again.
Indicator lamp2 goes out. The func-
tions in the rear are enabled again.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 your vehicle. Do not leave children un-
attended 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.i
Operation of the rear door windows with the
switches located in the driver’s door is still pos-
sible.

68 Safety and SecurityPanic alarm1Â button
Activating
Press and hold  button for at least
1 second.
An audible alarm and flashing exterior
lamps will operate briefly.
Deactivating
Press  button again.
or

Insert the SmartKey or the SmartKey
with KEYLESS-GO* in starter switch.
or

Press the KEYLESS-GO* start/stop
button (
page 317).
The SmartKey with KEYLESS-GO must
be inside the vehicle.
i
USA 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 re-
ceived, including interference that may
cause undesired operation.
Any unauthorized modification to this device
could void the user’s authority to operate the
equipment.
i
Canada 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 re-
ceived, 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.

69 Safety and Security
Driving safety systems
Driving safety systems
This section contains information about
Adaptive Brake Lights as well as the follow-
ing driving safety systems:

ABS (A
ntilock B
rake S
ystem)


Adaptive Brake


BAS (B
rake A
ssist S
ystem)


BAS Plus* (B
rake A
ssist S
ystem Plus*)


EBP (E
lectronic B
rake P
roportioning)


ESP
® (E
lectronic S
tability P
rogram)


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 28) comes on when you
switch on the ignition (
page 315). It goes
out when the engine is running.
Braking
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 the ability to
steer the vehicle.
Warning!
G
The following factors increase the risk of ac-
cidents:

Excessive speed, especially in turns


Wet and slippery road surfaces


Following another vehicle too closely
The ABS, BAS, BAS Plus*, EBP, ESP
® and
ETS cannot reduce this risk.
Always adjust your driving style to the pre-
vailing road and weather conditions.i
In winter operation, the maximum effective-
ness of the ABS, Adaptive Brake, BAS,
BAS Plus*, EBP, ESP
® and ETS is only achieved
with winter tires (
page 530), 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.