Porsche 2007 Cayenne Owner's Manual page 232

Tips on driving
f Avoid high engine speeds (max. 2,500 rpm).
f Do not perform manual gear changes when
driving, and try to avoid stopping.
Moving off in the water can be difficult due to
the high resistance and the loose surface in-
volved.
f Start the water crossing at a shallow place at
walking speed.
f After checking the body of water, take the
shortest path through it.
f Never drive into the water at high speed. The
resulting "bow wave" could damage the engine
and its accessories.
f Adjust your driving style to the unfamiliar sur-
roundings.
f Cross the body of water slowly and at a con-
stant speed.
f Never turn around when crossing a body of wa-
ter.
f If it is not possible to cross the body of water,
the car must be backed out of it in reverse
gear.
The servo pump and alternator can fail if the car is
driven through water for an extended period.
f If the servo pump fails, substantially more
force will have to be exerted in order to steer.
232
Driving and Driving Safety
Maintenance Note
The car requires a special check after the water
crossing.
f Remove mud from the tire tread.
f Briefly apply the brakes in order to dry them af-
ter driving through the water.