166
Driving and Driving Safety
When PSM is switched off, PSM support is no
longer provided in critical driving situations
outside the ABS control range.
f
PSM should always be switched on during
“normal” driving.
However, it may be a good idea to switch off
PSM temporarily in exceptional situations:
– On a loose surface and in deep snow.
– When “rocking the vehicle free”
(also with snow chains).
Information
The vehicle retains its enhanced braking readiness
through prefilling of the brake system even when
PSM is switched off.
When PSM is switched off, wheel-specific brake
interventions and the anti-slip control system
(ASR) are also switched off.
The automatic brake differential (ABD) remains on.
Switching PSM back on
f
Press button
.
PSM is active immediately.
The indicator light on the button and the
PSM OFF warning light on the instrument panel
go out.
The message “PSM on” appears on the
multi-function display in the instrument panel.
“Sport Plus” mode
A sportier setup is obtained when “Sport Plus”
mode is switched on.
PSM interventions occur later than in Normal
mode. The vehicle can be maneuvred with greater
agility at its performance limits, without having to
dispense with the assistance of PSM in
emergency situations. This helps to achieve
optimal lap times, particularly on race circuits and
on a dry road surface.
PSM warning light
– The PSM warning light on the instrument panel
lights up for a lamp check when the ignition is
switched on.
– The light indicates a control operation, even
when PSM is switched off, e.g. brake control in
the event of one-sided wheel spin.
– The light - in conjunction with the multi-function
display - indicates a fault.
The warning message “
PSM failure Consult
a workshop Adapted driving permitted
”
appears on the multi-function display in the
instrument panel.
For information on warning messages on the
multi-function display:
f
Please see the chapter “OVERVIEW OF
WARNING AND INFORMATION MESSAGES”
on page 114.
f
Adapt your driving style according to the
changed conditions.
f
Contact an authorized Porsche dealer.
Towing
f
Please see the chapter “TOWING”
on page 253.
HOLD Function: Drive-Off
Assistant, Standstill Management
The HOLD function, as an assistance function,
assists the driver when stopping and driving off on
upward slopes.
The vehicle is automatically prevented from rolling
back away from the desired direction of travel.
When the HOLD function is active, the indicator
light
on the instrument panel comes on.
Driving off with the Drive-Off Assistant on
vehicles with manual transmission
1.
Hold the vehicle securely on the slope with the
footbrake.
The engine must be running.
2.
Press the clutch pedal fully.
3.
Engage a gear corresponding to the direction
of travel up the slope (1st gear or reverse
gear).
4.
Release the footbrake while keeping the clutch
pedal pressed.
The vehicle is held on the slope to facilitate
driving off and prevent it from rolling back.
5.
Drive off as usual.
Information
If the vehicle is held on the slope by the electric
parking brake, drive off in the usual way.
The electric parking brake detects the driver’s
intention to drive off and is released automatically.
For information on the electric parking brake:
f
Please see the chapter “ELECTRIC PARKING
BRAKE” on page 134.
No PSM assistance
WARNING
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