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Driving and Driving Safety
183
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”.
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 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.
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 129.
f
Adapt your driving style according to the
changed conditions.
f
Contact an authorized Porsche dealer.
Towing
For information on towing:
f
Please see the chapter “TOWING”
on page 278.
No PSM assistance
WARNING
h
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