Mercedes-Benz E 320 Wagon 1999 ASR - Manual (Page 2)

102
Electronic Traction System (ETS)
(Model with All Wheel Drive
[AWD]: 4-ETS)
The ETS improves vehicle traction,
especially under slippery road
conditions. The brakes are applied to
the spinning wheel and power is
transferred to the wheel(s) with
traction. At approximately 50 mph (80
km/h), the ETS switches off at the front
wheels, and at approximately 80 mph
(130 km/h) at the rear wheels.
The ETS 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.
Important!
If the ETS 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.
ETS Control
If the yellow BAS/ETS malfunction
indicator lamp comes on while the.
ETS warning lamp flashes, with the
engine running, the electronic traction
system is being switched off
temporarily on one ore more wheels to
prevent overheating of the drive wheel
brakes.
If the BAS/ETS malfunction indicator
lamp comes on permanently with the
engine running, a malfunction has been
detected in either system.
If the BAS malfunctions, the brake
system functions in the usual manner,
but without BAS.
Have the BAS or ETS checked at your
authorized Mercedes-Benz dealer as
soon as possible.
With the ABS malfunctioning, the ETS is
also switched off.
Caution!
Model with AWD: 4-ETS
Operational tests with the engine
running can only be conducted on a 2-
axle dynamometer. Otherwise the 4-
ETS applies the brakes to the spinning
wheels.
If the vehicle is towed with one axle
raised (see Towing the vehicle in Index),
or when testing the parking brake on a
brake test dynamometer,
the engine must be shut off (key in
steering lock position 0 or 1).
Otherwise, the electronic traction
system will immediately be engaged
and will apply the brakes.
Notes:
The indicator lamp for the ETS is
combined with that of the BAS
The yellow BAS/ETS malfunction
indicator lamp in the instrument cluster
and the yellow ETS warning lamp in
the speedometer dial come on with the
electronic key in steering lock position
2. They should go out with the engine
running.
Driving the vehicle with varied size tires
will cause the wheels to rotate at
different speeds, therefore the
acceleration slip regulation may
activate (yellow ETS warning lamp in
speedometer dial comes on). For this
reason, all wheels, including the spare
wheel, must have the same tire size.
In winter operation, the maximum
effectiveness of the four wheel
electronic traction system is only
achieved with Mercedes-Benz
recommended M+S radial-ply tires
and/or snow chains.