Mercedes-Benz CLA 2020 Operator's Manual page 210

208 Driving and parking
Display in the Instrument Display
Instrument Display in the Widescreen Cockpit
1 Permissible speed
2
Permissible speed when there is a restriction
3 Additional sign with restriction
Vehicles with a standard Instrument Dis‐
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play: a + symbol next to a traffic sign in the
Instrument Display indicates that additional
traffic signs have been detected. These can
also be displayed in the media display and
optionally in the Head-up Display.
If Traffic Sign Assist cannot determine the cur‐
rent maximum permissible speed (e.g. due to
missing signs), the following display appears in
the Instrument Display:
This is displayed continuously if the vehicle is in
a country where Traffic Sign Assist is not sup‐
ported. Traffic Sign Assist is not available in all
countries.
% Also observe the information on display mes‐
sages in Traffic Sign Assist (
/
System limits
The system may be impaired or may not function
in the following situations:
If there is poor visibility, e.g. due to insuffi‐
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cient illumination of the road, if there are
highly variable shade conditions or in rain,
snow, fog or heavy spray.
If there is glare, e.g. from oncoming traffic,
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direct sunlight or reflections.
If the windshield in the area of the multifunc‐
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tion camera is dirty, or if the camera is fog‐
ged up, damaged or covered.
If the traffic signs are hard to detect, e.g. due
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to dirt or snow, or because they are covered
or due to insufficient lighting.
If the information in the navigation system's
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digital map is incorrect or out-of-date.
If the signs are ambiguous, e.g. traffic signs
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on construction sites or in adjacent lanes.
If you turn sharply, when passing traffic signs
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page 468).
outside the camera's field of vision.
Setting Traffic Sign Assist
Requirements:
Only vehicles with Driving Assistance
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Package:
Active Distance Assist DISTRONIC must be
activated for the automatic adoption of
speed limits.