Porsche Turbo 2007 Driver Manual page 162

If manual mode fails, the control electronics
switch to automatic mode.
In this event, the instrument panel will display
selector lever position D.
f Have the fault repaired. Consult a qualified
specialist workshop. We recommend that you
use a Porsche partner for this work since
these are staffed with trained personnel and
have the necessary parts and tools.
M – Manual selection mode
(in the off-road driving programme)
Tip on driving
The kickdown function is not active in selector
lever position M. Unlike in the on-road driving
programme, an automatic upshift is not
performed when the engine-speed limit is
reached.
Shifting up
f Press upper part (+) of a rocker switch A or
f Push selector lever B forward in the M gate.
Shifting down
f Press lower part (–) of a rocker switch A or
f Push selector lever B back in the M gate.
Depending on driving speed and engine speed,
you can shift up or down at any time. However,
gear changes which would exceed the upper or
lower engine-speed limit are not executed by the
control unit.
You can change down two gears by quickly
pressing the rocker switches A or selector lever B
twice.
The gear is changed down automatically just
before idle speed is reached.
f Select an appropriately low gear on upward
and downward slopes.
This will ensure optimum use of engine power
and engine braking.
If manual mode fails, the control electronics
switch to automatic mode. In this event, the instru-
ment panel will display selector lever position D.
f Have the fault repaired. Consult a qualified
specialist workshop. We recommend that you
use a Porsche partner for this work since
these are staffed with trained personnel and
have the necessary parts and tools.
Stopping
f For a brief stop (e.g. at a traffic light), leave the
selector lever in drive position and hold the
vehicle with the brake pedal.
f Do not hold the car on a slope using the accel-
erator. Use the brake pedal or the parking
brake instead.
f Before leaving the vehicle, always apply the
parking brake and move the selector lever to
position P.
Tip on driving
In selector lever positions D and M, the hillholder
function makes it easier to move off from a stand-
still on an upward slope when the engine is
running. The driver does not have to apply the
brake.
f For information on using the hillholder function:
Please observe the chapter "HILLHOLDER –
MOVING-OFF ASSISTANT ON VEHICLES WITH
TIPTRONIC S" on Page 176.
Driving and Driving Safety
161