MERCEDES-BENZ S55AMG 2002 W220 Owner's Manual

278 Driving systems
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Antilock brake system (ABS)
Important!
The ABS improves steering control of the vehicle during
hard braking maneuvers.
The ABS prevents the wheels from locking up above a
vehicle speed of approximately 5 mph (8 km / h)
independent of road surface conditions.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 pulsation.
Continuous steady brake pedal pressure results in
applying the advantages of the ABS, namely braking
power and ability to steer the vehicle.
In the case of an emergency brake maneuver keep
continuous full pressure on the brake pedal. In this
manner only can the ABS be most effective.
On slippery road surfaces, the ABS will respond even
with light brake pedal pressure because of the
increased likelihood of locking wheels. The pulsating
brake pedal can be an indication of hazardous road
conditions and functions as a reminder to take extra
care while driving.
Wa r n i n g !
Do not pump the brake pedal, rather use firm,
steady brake pedal pressure. Pumping the brake
pedal defeats the purpose for ABS and significantly
reduces braking effectiveness.

279 Driving systems
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cluster displayPractical hints Car care Index ABS control
The ABS malfunction indicator lamp- in the
instrument cluster comes on with the electronic key in
starter switch position 2 and should go out with the
engine running.
When the ABS malfunction indicator lamp in the
instrument cluster comes on while the engine is
running, it indicates that the ABS has detected a
malfunction and has switched off. In this case, the brake
system functions in the usual manner, but without
antilock assistance.
For ABS malfunction indicator lamp, see page 306.
With the ABS malfunctioning, the BAS and ESP are also
switched off. The ABS malfunction indicator lamp and
the ESP warning lamp come on with the engine
running.
If the charging voltage falls below 10 volts, the
malfunction indicator lamp comes on and the ABS is
switched off. When the voltage is above this value again,
the malfunction indicator lamp should go out and the
ABS is operational.If the ABS malfunction indicator lamp stays illuminated,
have the system checked at your authorized
Mercedes-Benz Center as soon as possible.
Note:
To alert following vehicles to slippery road conditions
you discover, operate your hazard warning flashers as
appropriate.
Wa r n i n g !
ABS cannot prevent the natural laws of physics
from acting on the vehicle, nor can it increase
braking or steering efficiency beyond that afforded
by the condition of the vehicle brakes and tires or
the traction afforded. The ABS cannot prevent
accidents, including those resulting from excessive
speed in turns, following another vehicle too
closely, or aquaplaning. Only a safe, attentive, and
skillful driver can prevent accidents. The
capabilities of a ABS equipped vehicle must never
be exploited in a reckless or dangerous manner
which could jeopardize the user’s safety or the
safety of others.

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Electronic stability program (ESP)
The ESP enhances directional control and reduces
driving wheel spin of the vehicle under various driving
conditions.
Over/understeering of the vehicle is counteracted by
applying brakes to the appropriate wheel to create a
countervailing vehicle movement. Engine torque is also
limited. The ESP warning lamp, located in the
speedometer dial, starts to flash when ESP is in
operation.Important!
If the ESP warning lampv flashes:
•During take-off apply as little throttle as possible.
•While driving ease up on the accelerator.
•Adapt your speed and driving to the prevailing road
conditions.
•Do not switch off the ESP.
Caution!
If the vehicle is towed with the front axle raised (see
page 361, Towing the vehicle), the engine must be shut
off (electronic key in starter switch position 0 or 1).
Otherwise, the ESP will immediately be engaged and
will apply the rear wheel brakes.
Wa r n i n g !
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 aquaplaning. Only a safe,
attentive, and skillful driver can prevent accidents.
The capabilities of an ESP equipped vehicle must
never be exploited in a reckless or dangerous
manner which could jeopardize the user’s safety or
the safety of others.

281 Driving systems
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The yellow ESP warning lampv in the speedometer
dial comes on with the electronic key in starter switch
position 2. It should go out with the engine running.
If the ESP warning message is displayed, a malfunction
has been detected in the system. Only partial engine
output will be available.
Have the ESP checked at your authorized
Mercedes-Benz Center as soon as possible.
For ESP warning message, see page 307.
With the ABS malfunctioning, the ESP is also switched
off.
Driving the vehicle with varied size tires will cause the
wheels to rotate at different speeds, therefore the ESP
may activate (yellow ESP warning lamp in speedometer
dial comes on). For this reason, all wheels, including the
spare wheel, must have the same tire size. When testing the parking brake on a brake test
dynamometer, the engine must be shut off. Otherwise,
the ESP will immediately be engaged and will apply the
rear wheel brakes.
In winter operation, the maximum effectiveness of the
ESP is only achieved with Mercedes-Benz recommended
M+S rated radial-ply tires and / or snow chains.
Synchronizing ESP
If the power supply was interrupted (battery
disconnected or empty), the ESP warning message may
be displayed with the engine running.
Turn steering wheel completely to the left and then to
the right. The ESP warning message should go out.

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ESP control switch
ESP control switch located on center console.
1Press to switch ESP off
ESP warning lampv, located in speedometer
dial, comes on.
2Press to switch ESP on
ESP warning lampv, located in speedometer
dial, goes out.To improve the vehicle’s traction when driving with
sn ow chain s, or startin g of f in d eep sn ow, san d o r grave l,
switch off ESP by pressing the upper half (1) of the ESP
switch. The ESP warning lampv, located in the
speedometer dial, is continuously illuminated.
With the ESP system switched off, the engine torque
reduction feature is cancelled. Therefore, the enhanced
vehicle stability offered by ESP is unavailable.
Adapt your speed and driving to the prevailing road
conditions.
A portion of the ESP system remains active, even with
the switch in the OFF position.
If one drive wheel loses traction and begins to spin, the
brake is applied until the wheel regains sufficient
traction. The traction control engages at vehicle speeds
up to approximately 24 mph (40 km / h), and switches
off at 50 mph (80 km / h).
Wa r n i n g !
When the ESP warning lamp is illuminated
continuously, the ESP is switched off. Adapt your speed and driving to the prevailing road
conditions.

283 Driving systems
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Avoid spinning of one drive wheel. This may cause
serious damage to the drive train which is not covered
by the Mercedes-Benz Limited Warranty.
The ESP warning lamp, located in the speedometer dial,
starts to flash at any vehicle speed as soon as the tires
lose traction and the wheels begin to spin.
To return to the enhanced vehicle stability offered by
ESP: press lower half (2) of the switch (the ESP warning
lamp in the speedometer dial goes out).
Vehicles with Distronic (DTR):
With the ESP switched off, the Distronic cannot be
switched on. See page 264 for activation of Distronic.Important!
If the ESP warning lamp flashes:
•during take-off, apply as little throttle as possible,
•while driving, ease up on the accelerator.
Wa r n i n g !
ESP should not be switched off during normal
driving other than in circumstances described
above. Disabling of the system will reduce vehicle
stability in standard driving maneuvers.

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Active body control (ABC)
(optional, standard on model S 600)
The switch is located on the center console
Press the switch when the engine is running:
1Suspension for sporty driving style
2Suspension for regular driving style
3Indicator lamp for sporty driving styleThe maximum suspension range is selected
automatically according to the selected ABC
mode (1 or 2), road condition, and driving style.
The selected suspension style is stored in memory, even
with the electronic key removed from the starter switch.
Suspension for regular driving style
This is the setting for general driving.
The system is set to regular driving mode when the
indicator lamp (3) is not illuminated.
Press lower half of switch to change from suspension
style for sporty driving to regular driving style.
Suspension for sporty driving style
This is the setting for sporty driving.
Press upper half of switch (1) to select suspension style
for sporty driving. The indicator lamp (3) comes on.
Note:
See “ACTIVE BODY CONTROL” on page 320 for
malfunction and warning messages.

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cluster displayPractical hints Car care Index Level control system for vehicles with
Airmatic system
The switch for the ride height adjustment is located on
the center console.
Press the switch when the engine is running:
1Raised level
2Normal level
3Indicator lampThe vehicle ride height in the normal level mode is
adjusted automatically according to the vehicle speed.
This increases vehicle safety and reduces fuel
consumption.
At speeds exceeding approximately 70 mph (110 km / h)
the vehicle ride height is reduced to approximately one
half inch (15 mm) below the normal level. The vehicle is
returned to the normal ride height setting once the
speed falls below approximately 35 mph (60 km / h).
Normal level
The system is set to normal level when the indicator
lamp (3) is not illuminated.
When the raised level ride height returns to the normal
level ride height, the indicator lamp (3) goes out.
Raised level
To select the raised level mode, press the upper half of
the switch (1). The indicator lamp (3) comes on.
Use the raised level setting for rough sections of the
road, for example.
The vehicle is raised by approximately 3/4 inch (20 mm).
The indicator lamp (3) lights up.

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The message “AIR SPRING – VEHICLE RISING” appears
in the multifunction display. The display switches off
when the vehicle is raised.
Notes:
The raised level setting switches off at speeds exceeding
approximately 75 mph (120 km / h), or if vehicle speed
is operated between 50 mph (80 km / h) and 75 mph
(120 km / h) for approximately 5 minutes. The message
“AIR SPRING – LEVEL CANCELLED” appears in the
display.
The raised level setting will be stored in memory after
the electronic key is removed from the starter switch if
you did not drive at the aforementioned speeds.
See “AIR SPRING” on page 331 for malfunction and
warning messages.Level control system for vehicles with
Active Body Control (ABC)
The switch is located on the center console.
Press the switch when the engine is running:
1Raise vehicle chassis
2Lower vehicle chassis
3Indicator lamp
4Indicator lamp

287 Driving systems
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cluster displayPractical hints Car care Index The vehicle chassis ride height is raised or lowered
automatically according to the selected setting and to
the vehicle speed. This helps to increase vehicle
handling safety and lowers fuel consumption.
The selected setting is stored in memory, even with the
electronic key removed from the starter switch.
Note:
See “ACTIVE BODY CONTROL” on page 320 for
malfunction and warning messages.Level control switch positions
Normal level – indicator lamps (3, 4) are not
illuminated. To change from raised level options I or II,
press lower half of switch (2) once respectively twice.
Raise level, option I – indicator lamp (3) is illuminated.
To change from normal level, press upper half (1) of
switch.
To change from raised level, option II, press lower
half (2) of switch.
Raised level, option 2 – indicator lamps (3, 4) are
illuminated.
To change from normal level or raised level, option I,
press upper half (1) of switch once respectively twice.
Normal level
Used for normal operation of the vehicle.
Speed dependent lowering of vehicle chassis
(approximate values):
•between 0 mph (0 km / h) and 35 mph (60 km / h) –
none
•between 35 mph (60 km/h) and 85 mph (140 km/h)
– lowered progressively by approximately
7/16inch
(11 mm)
Wa r n i n g !
To help avoid personal injury, keep hands and feet
away from wheel housing area, and stay away from
under the vehicle when lowering the vehicle
chassis.