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Electronic Traction System (4-ETS)
G
Observe Safety notes, see page 50.
The 4-ETS (four-wheel Electronic Traction
System) is a component of the ESP
®
. The
4-ETS improves the vehicle’s ability to utilize
available traction, especially under slippery
road conditions by applying the brakes to a
spinning wheel. In addition, more power is
transferred to the wheel(s) with traction.
The 4-ETS function is available between
vehicle speeds of 0 mph (km/h) and 37 mph
(60 km/h).
When you switch off the ESP
®
, the 4-ETS is
still enabled.
Switching off the ESP
®
G
Warning!
The ESP
®
should not be switched off during
normal driving other than in the
circumstances described below. Disabling
the system will reduce vehicle stability in
driving maneuvers.
To improve the vehicle’s traction, switch off
the ESP
®
in driving situations in which it
would be advantageous to have the drive
wheels spin and thus cut into surfaces for
better grip such as:
R
when driving with snow chains
R
in deep snow
R
in sand or gravel
R
when driving off-road
G
Warning!
Switch on the ESP
®
immediately if the
aforementioned circumstances do not apply
anymore. Otherwise the ESP
®
will not
stabilize the vehicle when it is starting to skid
or a wheel is spinning.
When you switch off the ESP
®
,
R
the ESP
®
does not stabilize the vehicle
R
the engine output is not limited, which
allows the drive wheels to spin and thus cut
into surfaces for better grip
R
the ESP
®
continues to operate when you
are braking
R
the 4-ETS will still apply the brakes to a
spinning wheel at vehicle speeds up to
approximately 37 mph (60 km/h)
R
the cruise control cannot be activated
R
the cruise control switches off if activated
i
When the ESP
®
is switched off and one or
more drive wheels are spinning, the ESP
®
warning lamp d in the instrument
cluster flashes. However, the ESP
®
will
then not stabilize the vehicle.
i
When the ESP
®
is switched off, it will be
switched on again automatically when
exceeding a vehicle speed of 37 mph (60
km/h) or exceeding a severity threshold of
side acceleration.
X
With the engine running, press ESP
®
switch : until the ESP
®
warning lamp
d in the instrument cluster comes on.
The ESP
®
is switched off.
G
Warning!
When the ESP
®
warning lamp d is
illuminated continuously, the ESP
®
is
Driving safety systems
53
Safety and security
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