Automatic transmission
Automatic transmission
S tronic, tiptronic
Introduction
The automatic transmission is controlled elec-
tronically. The transmission upshifts or down-
shifts automatically depending on which drive
program is selected.
When a
moderate driving style is used, the
transmission selects the most economical driving
mode. The transmission upshifts at a lower RPM
and downshifts at a higher RPM to improve fuel
efficiency.
The transmission switches to a sporty mode after
a kick-down or when the driver uses a
sporty
driving style
characterized by quick accelerator
pedal movements, heavy acceleration, frequent
changes in speed and traveling at the maximum
speed.
If desired , th e driver can also select the gears
manually (tiptronic mode) 9 page 110.
Various automatic transmissions may be instal-
led, depending on the model:
S tronic transmission
The S tronic is a dual-clutch transmission. Power
is transferred using two clutches that work inde-
pendently from one another. They replace the
torque converter used in conventional automatic
transmissions and allow th e vehicle to accelerate
without a noticeable interruption in traction.
tiptronic transmission
In the tiptronic transmission, power is transfer-
red by a torque converter.
106
Selector lever positions
Fig. 115 Display in the instrument cluster: selector lever
position
The selector lever position engaged appears next
to the selector lever as well as in th e instrument
cluster display.
P - Park
In this selector lever position the transmission is
mechanically locked. Engage P only when the ve-
hicle is
completely stopped¢ &. in Driving the
automatic transmission on page 108.
To shift in or out of position P, you must first
press and hold the brake pedal and then press
the release button in the selector lever handle
while moving the selector lever to or from P. You
can shift out of this position only with the igni-
tion on.
R - Reverse
Select R only when the vehicle is at a full stop
and the engine is running at idle speed¢ &. in
Driving the automatic transmission on
page 108.
Before you move the selector lever to R, press
both the button in the handle of the selector lev-
er
and the brake pedal at the same time.
When the ignition is on, the backup lights illumi-
nate when the selector lever is moved into R.
N - Neutral
The transmission is in neutral in this position.
Shift to this position for standing with the brakes
applied
9 A in Driving the automatic transmis-
sion on page 108.
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