top of the windscreen. The data and general
traffic regulations stored in the navigation sys-
tem are also used to determine the current
speed limit.
If a traffic sign that is relevant to your vehicle is passed, the display of the speed limits and over-
taking restrictions is updated.
The display can also be updated without a visible traffic sign if:
R the vehicle changes roads (e.g. motorway exit
or slip road)
R a village or town boundary is passed which is
stored in the digital map
R the last traffic sign detected by the camera
has not been repeated
If a sign indicating the end of a restriction (speed limit or overtaking restriction) is passed, the
sign is displayed for five seconds. The currently
applicable traffic regulation continues to be
shown in the assistance graphic display
(Y page 163).
The camera also detects traffic signs with a
restriction indicated by an additional sign (e.g. in wet conditions).
The traffic signs are only displayed with the
restrictions if:
R the regulation must be observed with the
restriction, or
R Traffic Sign Assist is unable to determine
whether the restriction applies
If Traffic Sign Assist is unable to determine a
maximum permitted speed from any of the avail- able sources, no speed limit is displayed in the
instrument cluster either. Traffic Sign Assist is not available in all coun-
tries. In this case, symbol :is shown in the
assistance graphic display (Y page 163).Important safety notes Traffic Sign Assist is only an aid and is not always
able to correctly display speed limits and over-
taking restrictions. Traffic signs always have pri-
ority over the Traffic Sign Assist display.
The system may be either functionally impaired
or temporarily unavailable if:
R visibility is poor, e.g. due to snow, rain, fog or
spray
R there is glare, e.g. from the sun being low in
the sky
R there is dirt, ice or misting on the windscreen
in the vicinity of the camera
R traffic signs are hard to detect, e.g. due to dirt,
ice or snow
R the traffic signs are insufficiently lit at night
R signs are ambiguous, e.g. traffic signs on con-
struction sites or in adjacent lanes
R the information in the digital street map of the
navigation system is incorrect or out of date
Switching the message function on/off The Traffic Sign Assist message function can be
switched on in the on-board computer. When
you pass a traffic sign, traffic regulations (speed
limits and overtaking restrictions) are shown in
the multifunction display for five seconds. The
previous menu is then shown automatically.
The wrong-way warning and the traffic sign dis- play for speed limits and overtaking restrictionsremain active even when the display has been
deactivated.
X Switch on the Traffic Sign Assist message
function via the on-board computer
(Y page 164).
Instrument cluster display Showing the assistance graphic
X Call up the assistance graphics display func-
tion using the on-board computer
(Y page 163).
X Select the Traffic Sign Assist display.
Detected traffic signs are displayed in the
instrument cluster. Driving systems
149Driving and parking Z
