
194
Driving and Driving Safety
Switching on PHC
f
Press the PHC button.
The indicator light on the button lights up.
Switching off PHC
f
Press the PHC button again.
The indicator light on the button goes out.
Information
The active system is again ready for operation if
the gradient is less than approx. 6 %.
Changing speed
The speed can be changed when PHC is
switched on:
f
The new desired speed is stored when you
release the brake or accelerator pedal
or
is set using the cruise control or adaptive
cruise control stalk.
Information
Cruise control readiness must be switched on:
f
Press button
A
on the control stalk.
Please see the chapter “CRUISE CONTROL” on
page 158.
Adaptive cruise control must be switched on:
f
Press button
R
on the control stalk.
Please see the chapter “ADAPTIVE CRUISE
CONTROL” on page 160.
Accelerating
f
Press the control stalk on the steering wheel
forward and keep it pressed (position
1
).
The desired speed is increased and stored
when you release the stalk.
Decelerating
f
Pull the control stalk on the steering wheel
towards the steering wheel and keep it pulled
(position
2
).
The desired speed is reduced and stored when
you release the stalk.
Measurements on test stands
Brake tests
Brake tests must be carried out only in the on-road
driving program and on plate-type or roller-type
test stands.
The following limit values must not be exceeded
on roller-type test stands:
– Test speed 4.7 mph (7.5 km/h)
– Test duration 20 seconds
Electric parking brake test
Electric parking brake tests on the brake test
stand must be performed only with the ignition
switched off and with the Tiptronic selector lever
in position
N
or with the gearshift lever in neutral.
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.
PHC readiness
The gray symbol on the multi-purpose
display of the instrument panel indicates
readiness.
PHC control is active/
Desired speed
The desired speed is displayed in orange
under the PHC symbol, which has now
turned white.