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Start and driving
Electronic torque management
(XDS)* When taking a curve, the driveshaft differen-
tial mechanism allows the outer wheel t
o t
urn
at a higher speed than the inner wheel. In this
way, the wheel that is turning faster (outer
wheel) receives less drive torque than the in-
ner wheel. This may mean that in certain sit-
uations the torque delivered to the inner
wheel is too high, causing the wheels to spin.
On the other hand, the outer wheel is receiv-
ing a lower drive torque than it could transmit.
This causes an overall loss of lateral grip on
the front axle, resulting in understeer or
“lengthening” of the trajectory.
The XDS system can detect and correct this
effect via the sensors and signals of the ESC.
Via the ESC, the XDS will brake the inside
wheel and counter the excess driving torque
of that wheel. This means that the driver
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Driving
The system maintains brake pressure for ap-
pr o
ximat ely tw
o seconds aft
er the driver
takes his foot off the brake pedal to prevent
the vehicle from lurching backward when it is
started. During these 2 seconds, the driver
has enough time to release the clutch pedal
and accelerate without the vehicle moving
and without having to use the handbrake,
making start-up easier, more comfortable
and safer.
These are the basic operation conditions:
Page 235 of 372
Start and driving
Automatic gearbox/DSG au-
t omatic gearbo
x*
Intr oduction Your vehicle is equipped with an electronical-
ly controlled manual gearbox. T
or
que be-
tween the engine and the gearbox is trans-
mitted via two independent clutches. They
replace the torque converter found on con-
ventional automatic gearboxes and allow for
smooth, uninterrupted acceleration of the ve-
hicle.
The tiptronic system allows the driver to
change gears manually if desired
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Driving
In certain circumstances (i.e. traffic hold-ups,
short st ops, et
c.) and t o impr
o
ve comfort, the
vehicle can start up in the D2 gear ratio 1)
.
Sport mode (S) must be selected for a sporty
driving style. This setting makes use of the en-
gine
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