2003 MERCEDES-BENZ E320 4MATIC WAGON traction control

218 Driving instructions
Te ch n i c a l
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and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Tire traction
The safe speed on a wet, snow covered or icy road is
always lower than on a dry road.
You should pay particular attention to the condition of
the road whenever the outside temperatures are close to
the freezing point.
We recommend M+S rated radial-ply tires for the winter
season for all four wheels to insure normal balanced
handling characteristics. On packed snow, they can
reduce your stopping distance as compared with
summer tires. Stopping distance, however, is still
considerably greater than when the road is not snow or
ice covered.Tire speed rating
Your vehicle is factory equipped with “H”-rated tires,
which have a speed rating of 130 mph (210 km / h).
Despite the tire rating, local speed limits should be
obeyed. Use prudent driving speeds appropriate to
prevailing conditions.
An electronic speed limiter prevents your vehicle from
exceeding the speed rating.
Wa r n i n g !
If ice has formed on the road, tire traction will be
substantially reduced. Under such weather
conditions, drive, steer and brake with extreme
caution.
Wa r n i n g !
Even when permitted by law, never operate a
vehicle at speeds greater than the maximum speed
rating of the tires.Exceeding the maximum speed for which tires are
rated can lead to sudden tire failure causing loss of
vehicle control and resulting in personal injury
and possible death.

225 Driving systems
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data Instruments
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cluster displayPractical hints Car care Index Brake assist system (BAS)The BAS is designed to maximize the vehicle‘s braking
capability during emergency braking maneuvers by
having maximum power boost applied to the brakes
more quickly in emergency braking conditions than
might otherwise be afforded solely by the driver‘s
braking style. This can help reduce braking distances
over what ordinary driving and braking style might do.
The BAS complements the antilock brake system (ABS).
Applying the brakes very quickly results in maximum
BAS assistance.
To receive the benefit of the system you must apply
continuous full braking power during the stopping
sequence. Do not reduce brake pedal pressure.
Once the brake pedal is released, the BAS is deactivated.
Wa r n i n g !
BAS cannot prevent the natural laws of physics
from acting on the vehicle, nor can it increase
braking efficiency beyond that afforded by the
condition of the vehicle brakes and tires or the
traction afforded. The BAS 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 BAS equipped car must never be
exploited in a reckless or dangerous manner which
could jeopardize the user’s safety or the safety of
others.

228 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
steering lock 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 248.
With the ABS malfunctioning, the BAS and ESP are also
switched off. Both malfunction indicator lamps 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 an 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.

229 Driving systems
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data Instruments
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cluster displayPractical hints Car care Index Four wheel electronic traction system (4MATIC)
with electronic stability program (ESP)
(Model with 4MATIC All Wheel Drive)
The 4MATIC improves vehicle’s ability to use available
traction, e.g. during winter operation in mountains
under snowy conditions, by applying power to all four
wheels.
Important!
If the ESP warning lamp 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.Caution!
Operational tests with the engine running can only be
conducted on a 2-axle dynamometer. Otherwise the ESP
will immediately be engaged and will apply the brakes
to the spinning wheels.
The engine must be shut off (electronic key in steering
lock position 0 or 1):
•if the the vehicle is towed with one axle raised (only
applicable to vehicles without 4MATIC, see also
page 294).
•when testing the parking brake on a brake test
dynamometer (vehicles with 4MATIC should only be
tested on a two-axle dynamometer).
The warning lamp in the speedometer blinks at any
speed as soon as one tire loses traction.
Note:
In winter operation, the maximum effectiveness of the
4MATIC is only achieved with Mercedes-Benz
recommended M+S rated radial-ply tires and / or snow
chains.

230 Driving systems
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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 294), the engine must be shut off (electronic key in
steering lock 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.

232 Driving systems
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data Instruments
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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
snow chains, or starting off in deep snow, sand or gravel,
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.

233 Driving systems
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Note:
Avoid spinning of a drive wheel. This may cause serious
damage to the drivetrain 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).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.

334 Consumer information
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Consumer information
This has been prepared as required of all manufactures
of passenger cars under Title 49, Code of U.S. Federal
Regulations, Part 575 pursuant to the “National Traffic
and Motor Vehicle Safety Act of 1966”.
Uniform tire quality grading
Quality grades can be found where applicable on the
tire sidewall between tread shoulder and maximum
section width. For example:
All passenger car tires must conform to federal safety
requirements in addition to these grades.Treadwear
The treadwear grade is a comparative rating based on
the wear rate of the tire when tested under controlled
conditions on a specified government test course. For
example, a tire graded 150 would wear one and one-half
(1
1/2) times as well on the government course as a tire
graded 100. The relative performance of tires depends
upon the actual conditions of their use, however, and
may depart significantly from the norm due to
variations in driving habits, service practices and
differences in road characteristics and climate.
Tread wear 200 Traction AA Temperature A