Porsche Cayenne Owner's Manual page 200

Low Range indicator light
If the Low Range indicator light beside the rocker
switch flashes when you attempt to operate
rocker switch, the conditions for a shift have not
been met:
– Vehicle has exceeded or gone below the limit
speed.
– Tiptronic selector lever is not in position N.
200
Driving and Driving Safety
A - Rocker switch
B - Low Range is engaged
Changing from on-road driving program
to off-road driving program
f Reduce speed to below 9 mph (15 km/h) or
stop vehicle.
f Move Tiptronic selector lever to position N.
f Push rocker switch A forward until activation of
the off-road driving program is indicated on the
multi-purpose display of the instrument panel
and by illumination of light-emitting diode B.
The Low Range indicator light on the instru-
ment panel and light-emitting diode B beside
the rocker switch flash several times during
the shifting process.
Low Range is now engaged.
Danger!
Risk of accident, resulting in serious perso-
nal injury or death due to uncontrolled vehic-
le movement. The Tiptronic selector lever is
blocked during the shifting procedure. Shif-
ting when driving uphill can cause the vehicle
to stand still or even roll backwards, if the
shifting procedure has not yet been comple-
ted. When driving downhill, the vehicle can
accelerate unintentionally while shifting.
f Increased brake readiness is required.