110 Ad a pti v e crui se control
Vehicles that are difficult to detect
Applies to vehicles: with adaptive cruise control
Fig. 127 Two-w heeled vehicle driving ahead
Vehicles that are diff icult to detect, e.g. two -
wheeled vehicles ahead, vehicles with high
ground clearance, protruding load , are fre-
quently detected late or not at all, under
some circumstances.
Stationary vehicles
Applies to vehicles: with adaptive cruise control
Fig. 128 Turn ing and st a tionar y vehicle
Fig. 129 Shee ring out an d sta tiona ry vehicle
If a vehicle that has been detected by the ACC
system turns
off or sheers out , and there is a
st ationary vehicle ahead of t ha t vehicle, the
ACC system does not respond to the station -
ary vehicle ~
fig. 128 and ¢ fig. 129 .
Audi braking guard
Description
Applies to vehicles: with adaptive cruise contro l
Audi braking guard warns you of a threat en-
ing collision with a vehicle ahead.
Fig. 130 Disp lay in t he instrum e nt cluste r
The Aud i braking g uard is act ive from a speed
of approx. 20 mph (30 km/h) and wo rks with-
in the system limits ¢
page 108 even when
the adaptive cruise control is deactivat ed.
A radar sensor is built into the front of the ve-
hicle
¢ page 99 , fig. 111. The system is in-
tended to measu re the distance to ref lective
surfaces. If a measurement is not possib le,
the system does not respond.
When t he me asurement has taken pla ce, the
system can assess a hazardous situation,
when a vehicle ahead suddenly brakes or when
your own vehicle is driving at high speed to-
wards a much slower vehicle ahead. As soon
as the system assumes that a poss ible coll i-
sion with the vehicle ahead can only be avoid-
ed by immediate a ll-out braking or by an
avoiding maneuver, a warning appea rs.
The system has a pre-set response t ime to be
able to warn in good time . This system re-
sponse time is automatically reduced if you
acce le rate actively, for example to jo in a high-
way. Braking, transverse accele rat ion and the
stee ring a ng le can lead to a reduced system
response time. The war ning is deactivated if
you begin to overtake with f ull acceleration .
The system draws your attent io n to two differ-
en t hazardous s ituations :
Iii>
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