Porsche Cayenne Turbo Driver Manual page 195

Engine Braking Support
(assistance when driving downhill)
The Engine Braking Support system is an assist-
ance system which helps the driver when driving
slowly downhill at speeds up to approx. 20 km/h
(12 mph), e.g. on steep slopes or on wintry
mountain roads.
Engine Braking Support is active and brakes the
vehicle as long as the accelerator is not used
when travelling downhill.
If road grip is lost on one or more wheels, the
system brakes the wheels which have good road
contact.
Like all brakes, the braking ability of the Engine
Braking Support system is impaired by slippery
surfaces (e.g. on icy or loose surfaces).
Warning!
Risk of accident. Reduced braking ability on
a slippery surface.
f Always adjust your driving style to the driving
situation.
Preconditions:
– The accelerator must not be used when travel-
ling downhill.
– The speed must not exceed approx. 20 km/h
(12 mph).
– The Tiptronic selector lever position D, M or R
must be engaged.
Tip on driving
The Engine Braking Support system is active when
driving downhill either forwards or backwards.
Checks on test stands
Performance test
Performance tests on roller test stands are not
approved by Porsche.
Brake tests
Brake tests must be carried out only in the High
Range on-road driving programme and on plate-
type or roller test stands.
The following limit values must not be exceeded
on roller test stands:
– Test speed 7.5 km/h (4.7 mph)
– Test duration 20 seconds
Parking brake test
Parking brake tests on the brake tester must be
performed only with the ignition switched off and
the Tiptronic selector lever in position N.
Balancing wheels on the vehicle
During finish balancing of the wheels, the entire
vehicle must be lifted and the wheels must be free
to turn.
Driving and Driving Safety
195