Owner's Manual for the vehicle. With a quick reference ... - E38.org

70nRear window defroster
Cruise control
380de622
To activate
Press the button: The rear window defroster
continues high-output operation
for as long as the indicator lamp remains
on (rapid thaw).
After the indicator lamp goes out, the
defroster continues operating at reduced
power for a limited period before
deactivating automatically.
To deactivate
If the indicator lamp is on, press the
button.
390de058
You can store and automatically maintain
any desired vehicle speed above
approx. 20 mph (30 km/h).
To activate the system
In ignition key positions 1 and 2:
Press button 4, the indicator lamp in the
instrument cluster comes on. You can
now use the cruise control.
To store and maintain speed
or to accelerate
Press button 1 briefly:
The system records and maintains the
current vehicle speed. Every time you
tap the button, the speed increases by
0.6 mph (1 km/h).
Press and hold button 1:
The vehicle accelerates without pressure
on the accelerator pedal. When
you release the button, the system
records and maintains the current
speed.
If, on a downhill gradient, the engine
braking effect is not sufficient,
the controlled speed can be exceeded.
Speed may not be maintained
on uphill grades if the engine output is
insufficient.<
To decelerate
Press button 2 briefly:
When the cruise control is active,
vehicle speed is reduced by approx.
0.6 mph (approx. 1 km/h) every time
you briefly press the button.
Press and hold button 2:
With the cruise control active, the system
automatically reduces the throttle
opening to slow the vehicle. When you
release the button, the system records
and maintains the current speed.