2002 MERCEDES-BENZ S55AMG engine

267 Driving systems
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Driving with Distronic activated
With the electronic key in starter switch position 2, the
distance warning lampl in the speedometer dial
comes on and goes out with the engine running.
If the distance sensor detects a slower vehicle moving in
front, your vehicle speed will be reduced by
deceleration and braking of up to 20% of the vehicle
braking capacity, so that you follow the vehicle ahead at
the preset distance, see page 273. Segments in the
speedometer illuminate to indicate the speed range from the speed of the vehicle in front up to your
vehicle’s selected speed. See also page 275 for notes on
the multifunction displays.
Wa r n i n g !
Distronic brakes (up to 20% of vehicle braking
power) the vehicle to restore the preset distance or
to maintain the speed. The brake pedal is
automatically retracted as this happens.Keep driver’s foot area clear at all times, including
the area under the brake pedal. Objects stored in
this area may impair pedal movement which could
interfere with the braking ability of the Distronic
system.Do not place your foot under the brake pedal – your
foot could become caught.

269 Driving systems
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Additional driving hints
Important!
When starting the engine, Distronic goes through an
initialization and self-test phase – this can take up to
2minutes.
The most likely cause for a malfunctioning system is a
dirty sensor (located behind the hood grille), especially
at times of snow and ice or heavy rain. In such a case,
Distronic will switch off, and the message
“DISTRONIC – CLEAN SENSOR!” appears in the
multifunction display.
For cleaning and care of the Distronic sensor, see
page 386.
Restart the engine after cleaning the sensor.
The following are some sample situations which may
influence the functions of Distronic.
Wa r n i n g !
Distronic works to maintain the speed selected by
the driver unless a moving obstacle proceeding
directly ahead of it in the same travel direction is
detected (e.g. following another vehicle ahead at a
distance set by Distronic). This means that:• your vehicle can pass another vehicle after you
change lanes,• while in a sharp turn or if the vehicle in front
is in a sharp turn, Distronic could lose sight of
a vehicle traveling in front of it, then your
vehicle could accelerate to the previously
selected speed.Distronic regulates only the distance between your
vehicle and those directly ahead, but does not
register stationary objects in the roadway, e.g.:
• a stopped vehicle in a traffic jam,
• a disabled vehicle,
• an oncoming vehicle.
The driver must always be on the alert and observe
all traffic and intercede with steering and braking
inputs as necessary.Wa r n i n g !
Distronic should not be used in snowy or icy road
conditions.

279 Driving systems
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
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.

280 Driving systems
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
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
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Notes:
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.

282 Driving systems
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
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.

284 Driving systems
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
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.

285 Driving systems
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
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.