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Assistant systems
189
Predictive speed adjustment
Predictive speed adjust-
ment
Intr
oduction
The predictive speed adjustment adapts the
speed to the speed limitations detected and
to the road layout (curves, crossings, round-
abouts, etc.).
Predictive speed adjustment is an additional
function of the ACC ›››page183 and uses the
trac signal detection system ›››page28 and
the navigation data of the infotainment system.
Predictive speed adjustment is available de-
pending on the equipment, although not in all
countries.
WARNING
The predictive speed adjustment smart tech-
nology cannot overcome the limits imposed
by the laws of physics and it only works
within the limits of the system. Never allow
the enhanced convenience of this function
induce you to take any risk that compromises
safety. If used negligently or involuntarily,
it may cause serious accidents and injuries.
The system is not a replacement for driver
awareness.
●
Always adapt your speed to suit visibility,
weather, road and trac conditions.
●
Always pay attention to trac and always
keep the vehicle environment in mind.
●
Always be prepared to adjust the speed
yourself
. If the trac sign recognition sys-
tem is not working properly or the navigation
data is not updated, the speed may change
unexpectedly and suddenly or may not be
suitable for the current trac situation. In
addition, the speed adjusted by the system
may not suit your driving style.
●
Always be prepared to adjust the speed
yourself. If you drive without any active gui-
ded route, if you leave the route calculated
by the navigation system or if the position of
the vehicle cannot be determined correctly
because the GPS does not provide accurate
data, the speed may change unexpectedly
and suddenly or may not adapt to the cur-
rent trac situation.
●
Always use up to date navigation data.
●
Always take into account the maximum
permitted speed. In the case of speed limita-
tions that are not included in the navigation
data, the maximum permitted speed may be
exceeded.
Note
Also note the information related to the ACC
r
elevant to safety ›››page183.
Limitations of the predictive speed
adjustment
In addition to the limitations of the road sign de-
tection system ›››page28 and the limitations
of the ACC, predictive speed adjustment has
the following limitations inherent to the system:
●
Predictive speed adjustment only recognises
trac signals that show a speed limitation. The
predictive speed adjustment does not take into
account, above all, the rules on priority of pas-
sage or trac lights.
●
Trac signs that indirectly show a speed re-
striction, e.g. signs at the entrance to towns,
are only recognised on the basis of navigation
data.
●
On roads that are not included in the naviga-
tion dat
a, or that are included with little accu-
racy, predictive speed adjustment is not availa-
ble.
●
If a speed limitation is notified based on the
navigation data without it being detected by
the trac signal detection system, the indica-
ted speed will be adjusted to the speed that
was saved the last time.
●
Predictive speed adjustment is not available
for speed limitations below approx. 20 km/h
(approx. 15 mph). In this case, a relevant mes-
sage is displayed on the instrument panel
screen.
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