section of road in the wrong direction triggers a
warning. Traffic Sign Assist detects traffic signs with multifunction camera :attached at the
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 in the following situations:
R The vehicle changes roads, e.g. motorway exit
or slip road
R A village or town boundary that is stored in the
digital map is passed
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 appears for five seconds. The currently
applicable traffic regulation continues to be
shown in the assistance graphic display
(Y page 231).
The camera also detects traffic signs with a
restriction indicated by an additional sign (e.g. in wet conditions).
The traffic signs are displayed on the instrumentcluster with the restrictions only in the following
situations:
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 permissible speed from any of the
available sources, no speed limit is displayed on the instrument cluster either. Traffic Sign Assist is not available in all coun-
tries. In this case, the display
:appears in the
speedometer.
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 in the following sit-
uations:
R Visibility is poor, e.g. due to snow, rain, fog or
spray
R Glare, e.g. from the sun being low in the sky
R 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, 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navigation system is incorrect or out of date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 If you have activated the Traffic Sign Assist mes-
sage function in the on-board computer, the
traffic regulations (speed limits and overtaking
restrictions) are displayed on the instrument
cluster for five seconds respectively. The wrong- way warning and the traffic sign display for
speed limits and overtaking restrictions remain
active even when the display has been deacti-
vated.
X Switch on the Traffic Sign Assist message
function via the on-board computer
(Y page 233).
Instrument cluster display Showing the assistance graphic
X Call up the assistant display function using
the on-board computer (Y page 231).
Detected traffic signs appear on the instru-
ment cluster. Driving systems
203Driving and parking Z
