Mercedes-Benz E-Class Owner's Manual page 250

Driving systems
248
If a traffic sign that is relevant to your vehicle
is passed, the display of the speed limits and
overtaking restrictions is updated.
The display can also be updated without a
visible traffic sign if:
the vehicle changes roads (e.g. motorway
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exit or slip road)
a village or town boundary is passed which
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is stored in the digital map
the last traffic sign detected by the camera
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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 applicable traffic regulation then appears
in the instrument cluster.
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:
the regulation must be observed with the
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restriction, or
Traffic Sign Assist is unable to determine
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whether the restriction applies
If Traffic Sign Assist is unable to determine a
maximum permitted speed from any of the
available 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 (
Important safety notes
Traffic Sign Assist is only an aid and is not
always able to correctly display speed limits
and overtaking restrictions. Traffic signs
always have priority over the Traffic Sign
Assist display.
The system may be either functionally
impaired or temporarily unavailable if:
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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 regula-
tions (speed limits and overtaking restric-
tions) are shown in the multifunction display
for five seconds. The previous menu is then
shown automatically.
The wrong-way warning remains active even
if the message function has been deactiva-
ted.
X
Y page 277).
visibility is poor, e.g. due to snow, rain, fog
or spray
there is glare, e.g. from the sun being low
in the sky
there is dirt, ice or misting on the wind-
screen in the area of the camera
traffic signs are hard to detect (dirt, ice,
snow)
there is insufficient illumination of the traf-
fic signs in the night
signs are ambiguous (e.g. traffic signs on
construction sites or in adjacent lanes)
the information in the digital street map of
the navigation system is incorrect or out of
date
Switch on the Traffic Sign Assist message
function via the on-board computer
( Y page 278).