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HDC Hill Descent Control
The concept
Using HDC
HDC is a system for driving downhill in
steep terrain. This system reduces vehi-
cle speed on steep downhill gradients,
thus allowing you to maintain control of
your BMW under these conditions.
The vehicle moves at slightly more than
walking speed without active interven-
tion from the driver.
With manual transmission:
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.
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
at a constant.
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 as
brake temperature is too high.
Activating system
Press the button, the indicator lamp
lights up.
The indicator lamp flashes when the
brakes are applied automatically.
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.
Deactivating system
Press the button again; the indicator
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.
HDC is automatically deactivated once
vehicle speed again exceeds approx.
35 mph/60 km/h.
Online Edition for Part No. 01 41 0 158 286 - �04/04 BMW AG
| Categories | BMW Manuals, BMW X5 Manuals |
|---|---|
| Tags | BMW E53, BMW X5 3.0i, BMW X5 4.4i, BMW X5 4.8is |
| Model Year | 2004 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
(4 votes, average: 4.5 out of 5)
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I own a 2004 BMW X5 4. 4 and the ccv vent valves keep popping off causing the engine to burn oil and grey smoke to become out tge tail pipe.