Porsche Cayenne Owner's Manual page 225

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
involved.
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
surroundings.
f Cross the body of water slowly and at a
constant speed.
f Never turn around when crossing a body of
water.
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.
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
after driving through the water.
225
Driving and Driving Safety