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Driving and Driving Safety
205
When you brake in the ABS control range
,
the vehicle is stabilised even when PSM is
switched off.
One-sided spinning
of the wheels is prevented,
even with PSM switched off.
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”.
– When using snow chains.
Tip on driving
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.
Adaptive cruise control is deactivated when PSM
is switched off.
When PSM is switched off, the slip monitoring
function of Porsche Doppelkupplung (PDK) is also
deactivated.
Switching PSM back on
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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 switched 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 maneuvered 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.
– 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” appears
on the multi-function display in the instrument
panel.
For information on warning messages on the multi-
function display:
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Please see the chapter “OVERVIEW OF
WARNING MESSAGES” on page 152.
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Adapt your driving style according to the
changed conditions.
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Contact a qualified specialist workshop in
order to correct the fault. We recommend that
you have an authorized Porsche dealer to do
this work, as they have the trained workshop
personnel and the necessary parts and tools
for this type of work.
Towing
For information on towing:
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Please see the chapter “TOWING” on
page 316.
PSM warning light