ECU MERCEDES-BENZ S430 2004 W220 Owner's Guide

72 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
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.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 twisted.
2Hook
3Anchorage ring

Securely fasten hook2, which is part
of the tether strap, to anchorage
ring3.
Warning!
G
When using a BabySmart
TM compatible
child seat on the front passenger seat, the
passenger front airbag will not deploy only if
the PASSENGER AIRBAG OFF indicator lamp
remains illuminated.
Make sure to check the indicator every time
you use the special system child seat.
Should the light go out while the restraint is
installed, please check installation. If the
light remains out, do not use the
BabySmart
TM restraint to transport children
on the front passenger seat until the system
has been repaired.
Do not place powered-on laptops, cell
phones and like electronic devices on the
front passenger seat. Signals from such de-
vices may interfere with the BabySmart
TM
system. Such signal interference may cause
the PASSENGER AIRBAG OFF indicator lamp
not to come on during self-test or be contin-
uously lit, indicating that the system is not
functioning.
iFor safety reasons, make sure the hook
has attached to the ring beyond the
safety catch, as illustrated.

73 Safety and Security
Occupant safety
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 fittings are covered with an
upholstery blend.
1Indicates the position of the anchors
2Anchors
3Upholstery blend
4Installation device

Move rear power seats*/bench* to the
rearmost position (
page 118).

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 solid 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 into the
webbing and loosen or misposition the child
restraint, lessening the effectiveness of the
child restraint and thus increasing the
chance or severity of injury in an accident.

74 Safety and SecurityOccupant 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 195)


adjustment of front passenger seat
from the rear* (
page 119)


cigarette lighter in rear (
page 240)
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 into the
webbing and loosen or misposition the child
restraint, lessening the effectiveness of the
child restraint and thus increasing the
chance or severity of injury in an accident.iThe 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 manufacturer’s
instructions.
Warning!
G
Children too big for child restraint systems
must ride in back seats using regular seat
belts. Position shoulder belt across chest
and shoulder, 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 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 anchor fittings2.
An incorrectly mounted child seat may come
loose during an accident which could result
in serious injury or death to your 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.

75 Safety and Security
Occupant safety
The override switch is located on the driv-
er’s door.
1Override switch
Activating override switch
Slide override switch 1 to the right.
A dot becomes visible. The functions in
the rear are disabled.Deactivating override switch

Slide override switch 1 to the left.
The functions 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 from the starter switch, take the
SmartKey with KEYLESS-GO* 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.
iOperation of the rear door windows
with the switches located in the driver’s
door is still possible.

76 Safety and SecurityPanic alarm
Panic alarmAn audible alarm and flashing exterior
lamps will operate for approximately
21/2minutes.
1Â button
Activating
Press and hold button1 for at least
one second.
Deactivating
Press button1 again.
or

Insert SmartKey in starter switch.
iFor operation in the USA only: This de-
vice complies with Part 15 of the
FCC Rules. Operation is subject to the
following two conditions:

This device may not cause harmful
interference, and


this device must accept any inter-
ference received, including interfer-
ence that may cause undesired
operation.
Any unauthorized modification to this
device could void the user’s authority
to operate the equipment.

77 Safety and Security
Driving safety systems
Driving safety systems
In this section you will find information on
the following driving safety systems:

ABS (A
ntilock B
rake S
ystem)


BAS (B
rake A
ssist S
ystem)


ESP (E
lectronic S
tability P
rogram)


4MATIC (Four Wheel Electronic Trac-
tion System)
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 with light brake pressure.
iIn winter operation, the maximum ef-
fectiveness of the ABS, ESP, BAS and
4MATIC is only achieved with winter
tires (M + S tires) or snow chains as re-
quired.
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, ESP, and 4MATIC cannot re-
duce this risk.
Always adjust your driving style to the pre-
vailing road and weather conditions.
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.

78 Safety and SecurityDriving safety systemsThe - indicator lamp in the instrument
cluster comes on when you turn the
SmartKey in the starter switch to
position2 or press the KEYLESS-GO*
start/stop button twice. 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.
The pulsating brake pedal can be an indica-
tion of hazardous road conditions and
functions as a reminder to take extra care
while driving.Emergency brake maneuver

Keep continuous full pressure on the
brake pedal.
For more information, see “Practical hints”
(
page 303).
BAS
The Brake Assist System (BAS) operates in
emergency situations. If you apply the
brakes very quickly, the BAS automatically
provides full brake boost, thereby poten-
tially reducing the braking distance. Apply
continuous full braking pressure until the
emergency braking situation is over. The
ABS will prevent the wheels from locking.
When you release the brake pedal, the
brakes function again as normal. The BAS
is then deactivated.
Warning!
G
The ABS cannot prevent the natural laws of
physics from acting on the vehicle, nor can
it increase braking or steering efficiency be-
yond that afforded by the condition of the
vehicle brakes and tires or the traction af-
forded. The ABS cannot prevent accidents,
including those resulting from excessive
speed in turns, following another vehicle too
closely, or hydroplaning. Only a safe, atten-
tive, and skillful driver can prevent acci-
dents. The capabilities of an ABS equipped
vehicle must never be exploited in a reck-
less or dangerous manner which could jeop-
ardize the user’s safety or the safety of
others.

79 Safety and Security
Driving safety systems
ESP
The Electronic Stability Program (ESP)
monitors the vehicle's traction (force of
adhesive friction between the tires and the
road surface) and handling.
The ESP recognizes when a wheel is spin-
ning or if the vehicle starts to skid. By ap-
plying brakes to the appropriate wheel and
by limiting engine output, the ESP works to
stabilize the vehicle. The ESP is especially
useful while driving off and on wet or slip-
pery road surfaces.
The ESP warning lamp v in the instru-
ment cluster flashes when the ESP is en-
gaged.
The ESP warning lamp v in the instru-
ment cluster comes on when you turn the
SmartKey in the starter switch to
position2 or press the KEYLESS-GO*
start/stop button twice. It goes out when
the engine is running.
Warning!
G
The BAS cannot prevent the natural laws of
physics from acting on the vehicle, nor can
it increase braking efficiency beyond that af-
forded by the condition of the vehicle brakes
and tires or the traction. The BAS cannot
prevent accidents, including those resulting
from excessive speed in turns, following an-
other vehicle too closely, or hydroplaning.
Only a safe, attentive, and skillful driver can
prevent accidents. The capabilities of a BAS
equipped vehicle must never be exploited in
a reckless or dangerous manner which
could jeopardize the user’s safety or the
safety of others.
Warning!
G
Never switch off the ESP when you see the
ESP warning lamp v flashing in the in-
strument cluster. In this case proceed as fol-
lows:

While driving off, apply as little throttle
as possible.


While driving, ease up on the accelera-
tor.


Adapt your speed and driving style to
the prevailing road conditions.
Failure to observe these guidelines could
cause the vehicle to skid.
The ESP cannot prevent accidents resulting
from excessive speed.

80 Safety and SecurityDriving safety systems
For more information, see “Practical hints”
(page 303).Switching off the ESP
To improve the vehicle's traction, turn off
the ESP in driving situations where it would
be advantageous to have the drive wheels
spin and thus cut into surfaces for better
grip such as:


starting out on slippery surfaces and in
deep snow in conjunction with snow
chains


in sand or gravel
Warning!
G
The ESP cannot prevent the natural laws of
physics from acting on the vehicle, nor can
it increase the traction afforded. The ESP
cannot prevent accidents, including those
resulting from excessive speed in turns, or
hydroplaning. Only a safe, attentive, and
skillful driver can prevent accidents. The ca-
pabilities of an ESP equipped vehicle must
never be exploited in a reckless or danger-
ous manner which could jeopardize the us-
er’s safety or the safety of others.!The ESP will only function properly if
you use wheels of the recommended
tire size (
page 384).
iDistronic* is switched off when ESP is
activated.
!Vehicles without 4MATIC:
Because of the ESP’s automatic opera-
tion, the engine and ignition must be
shut off (SmartKey in starter switch
position0 or1 or KEYLESS-GO
start/stop button* in position0 or1)
when:

the parking brake is being tested on
a brake test dynamometer


the vehicle is being towed with the
front/rear axle raised
Active braking action through the ESP
may otherwise seriously damage the
brake system.
For information on vehicles with
4MATIC, see “Four wheel electronic
traction system (4MATIC) with the
ESP” (
page 82).
Warning!
G
The ESP should not be switched off during
normal driving other than in the circum-
stances described below. Disabling of the
system will reduce vehicle stability in stan-
dard driving maneuvers.iDistronic* cannot be activated when
the ESP has been deactivated.

81 Safety and Security
Driving safety systems
The switch is located on the center con-
sole.
1ESP off / on
Press ESP switch1 until the ESP
warning lampv in the speedometer
comes on.
The ESP is deactivated.If one or more wheels are spinning, the
ESP warning lampv in the speedome-
ter flashes, regardless of the speed.
Traction control brakes a spinning wheel
even when the ESP is deactivated.
The ESP always operates when you are
braking, even when it has been deactivat-
ed.
Switching on the ESP

Press the ESP switch1.
The ESP warning lampv in the in-
strument cluster goes out. You are now
again in normal driving mode.
!Avoid spinning of a drive wheel for an
extended period with the ESP switched
off. This may cause serious damage to
the drivetrain which is not covered by
the Mercedes-Benz Limited Warranty.
Warning!
G
When the ESP warning lampv is
illuminated continuously, the ESP is
switched off.
Adapt your speed and driving to the prevail-
ing road conditions and to the non-operating
status of the ESP.