x
Be prepared to control the speed yourself at all
times. Malfunctions in the Dynamic Road Sign
Display function and out-of-date navigation da-
ta can lead to the speed being changed unex-
pectedly and suddenly or not being adapted to
the current traffic situation. Speeds regulated
by the system may also not match your individ-
ual driving style.
x
Be prepared to control the speed yourself at all
times. If you are driving without route guidance
or leave the route calculated by the navigation
system or if the vehicle position cannot be cor-
rectly determined due to inexact GPS data, the
speed may be changed unexpectedly and sud-
denly or not adapted to the current traffic situa-
tion.
x
Keep the navigation data up-to-date.
x
Always observe the maximum speed limit. The
maximum speed limit may be exceeded in the
case of speed limits that are not contained in
the navigation data.
Please also observe the safety-relevant infor-
mation on ACC.
Limits of predictive cruise control
Please refer to
at the start of the chapter on
page 163.
In addition to the system limitations of the Dynamic
Road Sign Display function → page 29 and ACC, the
predictive cruise control function has the following
additional, system-related limitations:
— The predictive cruise control function detects only
road signs that show a speed limit. In particular,
predictive cruise control does not take into ac-
count any rights of way or traffic lights.
— Road signs that indicate a speed limit indirectly,
e.g. place-name signs, will be detected only on
the basis of the navigation data.
— Predictive cruise control is not available on roads
which are not recorded in the navigation data or
not recorded with sufficient accuracy.
— If a speed limit is announced on the basis of the
navigation data but is not detected by the Dy-
namic Road Sign Display function, the announced
speed will be reset to the last-stored speed.
— Predictive cruise control is not available for detec-
ted speed limits below around 30 km/h (around
20 mph). A corresponding text message is shown
on the instrument cluster display in this case.
Activating predictive cruise control
Please refer to
at the start of the chapter on
page 163.
You can separately set the events to which the vehi-
cle should react in the Assist systems menu of the
Infotainment system → page 35:
— Reaction to the road layout.
— Reaction to permitted speeds.
Driving with predictive cruise con-
trol
Please refer to
at the start of the chapter on
page 163.
1.
Switch on ACC → page 161.
2.
Set the distance and speed.
3.
Activate predictive cruise control.
Displays
A message will be displayed on the instrument clus-
ter as soon as the system detects a speed limit or
a road characteristic ahead that has to be taken into
account. This message indicates the reason and the
speed to which your vehicle will be regulated due to
the restriction.
Speed regulation due to speed limit.
Speed regulation due to the road layout.
When automatic speed control is assumed due to
a speed limit, the detected speed is stored as the
new desired speed. In the case of control due to the
road layout, the vehicle will accelerate back up to
the previously stored speed after the restriction.
Announced speeds for driving through bends de-
pend on the driving profile → page 149.
Cancelling speed adaptation
— During the announcement: press the
button.
— During control: press the
button.
Adjusting the announced speed
The announced speed can be adjusted only in the
case of speed regulation due to a speed limit.
Steering wheel variant 1:
Press the
button only when
ACC is active.
+ 1 km/h
(1 mph)
:
164
Driver assist systems
