BMW 2004 X5 4.4i SAV 业主指南
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Overview
Controls
Maintenance
Repairs
Data
Index
HDC Hill Descent Control
The concept
HDC is a system for driving downhill in
steep terrain. This system reduces
vehicle speed on steep downhill gradi-
ents, thus allowing you to maintain con-
trol of your BMW under these condi-
tions.
The vehicle moves at slightly more than
walking speed without active interven-
tion from the driver.
steep terrain. This system reduces
vehicle speed on steep downhill gradi-
ents, thus allowing you to maintain con-
trol of your BMW under these condi-
tions.
The vehicle moves at slightly more than
walking speed without active interven-
tion from the driver.
HDC is available for activation at vehi-
cle speeds below approx. 20 mph/
35 km/h. When driving down steep hills
with a speed below approx. 20 mph/
35 km/h, the vehicle reduces speed
automatically down to slightly more
than walking speed, approx. 5 mph/
8 km/h, and then maintains this speed.
cle speeds below approx. 20 mph/
35 km/h. When driving down steep hills
with a speed below approx. 20 mph/
35 km/h, the vehicle reduces speed
automatically down to slightly more
than walking speed, approx. 5 mph/
8 km/h, and then maintains this speed.
You can use the accelerator or brakes
to vary this automatically controlled
speed within a range extending from
approx. 3 mph/5 km/h to 15 mph/
25 km/h.
You can specify a target speed within
the same range by using the +/– but-
tons of the cruise control.
to vary this automatically controlled
speed within a range extending from
approx. 3 mph/5 km/h to 15 mph/
25 km/h.
You can specify a target speed within
the same range by using the +/– but-
tons of the cruise control.
HDC is automatically deactivated once
vehicle speed again exceeds approx.
35 mph/60 km/h.
vehicle speed again exceeds approx.
35 mph/60 km/h.
Activating the system
Press the button, the indicator lamp
lights up.
lights up.
The indicator lamp flashes when the
brakes are applied automatically.
brakes are applied automatically.
Deactivating the system
Press the button again; the indicator
lamp goes out.
lamp goes out.
HDC is deactivated automatically above
a road speed of approx. 35 mph/
60 km/h and when the ignition is
switched off.
a road speed of approx. 35 mph/
60 km/h and when the ignition is
switched off.
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Using HDC
With manual transmission:
Use HDC in first gear and in Reverse
since the engine's braking effect is
diminished in the higher gears.
Use HDC in first gear and in Reverse
since the engine's braking effect is
diminished in the higher gears.
With automatic transmission:
You can use HDC in every drive posi-
tion.
You can use HDC in every drive posi-
tion.
In case of a malfunction
The indicator lamp in the button goes
out in the HDC mode or does not come
on when HDC is switched on:
HDC is temporarily not available if
brake temperature is too high.
out in the HDC mode or does not come
on when HDC is switched on:
HDC is temporarily not available if
brake temperature is too high.
If the indicator lamp also lights
up:
A fault as occurred in the HDC
up:
A fault as occurred in the HDC
system.
Have your BMW Sports Activity Vehicle
center inspect this system as soon as
possible.
Have your BMW Sports Activity Vehicle
center inspect this system as soon as
possible.
Online Edition for Part No. 01 41 0 157 897 - © 08/03 BMW AG