Further assist systems
Depending on the country, speed warnings are ei-
ther reset to the default setting or the last set-
ting is used when the vehicle is restarted.
System limits of the traffic sign recognition
The traffic sign recognition function is subject to
certain inherent restrictions and may be partially
or completely unavailable in the situations such
as the following:
Warning threshold if a speed is exceeded
(km/h) – You can set a custom warning threshold
in the Driver assist menu ðpage 134. During
any period in which you exceed the warning
threshold, the speed limit currently detected will
be shown on the display with an exclamation
mark and will flash continuously. Depending on
the setting, a warning tone may also sound brief-
ly. Depending on the country, the value set is ei-
ther stored after a restart or reset to the default
setting if a warning threshold of 5 km/h or
10 km/h was previously selected.
– The traffic sign recognition system is not availa-
ble in all countries.
– If the vehicle speed is too high.
– If the traffic signs are partially or completely
obscured, e.g. by trees, snow, mud or other
vehicles.
– If traffic signs deviate from the standard ap-
pearance.
– If traffic signs are damaged or bent.
– If matrix traffic signs are mounted on overhead
gantries.
Warning tone when speed is exceeded – You can
activate/deactivate the acoustic warning which is
issued when a specific speed is exceeded in the
Driver assist menu ðpage 134. Depending on
the country, the setting is either reset to the de-
fault or the last setting is used when the vehicle
is restarted.
– If traffic signs or routes have changed and the
navigation data are out of date.
– If speed stickers on slow-moving vehicles (such
as heavy goods vehicles) are detected.
WARNING
Tone when speed limit changes – You can acti-
vate/deactivate an acoustic warning which is is-
sued when a speed limit changes in the Driver as-
sist menu ðpage 134. The most recent set-
ting is used when the vehicle is restarted.
– Please note the safety precautions and sys-
tem limits of the supporting systems, sen-
sors and cameras ðpage 130 to
ðpage 132.
– Under adverse conditions, the traffic sign
recognition system may misinterpret or fail
to detect traffic signs. It is therefore possi-
ble that the speed limit display may occa-
sionally be unavailable or even incorrect –
risk of accident! It is essential that you ad-
just your speed to suit the weather, road,
terrain and traffic conditions.
1)
Settings related to towing a trailer
You can switch the trailer-specific speed warning
on/off and adjust the individual settings in the
Driver assist menu ðpage 134. The following
settings depend on the equipment fitted in your
vehicle and only apply to factory-fitted towing
brackets.
Setting the traffic sign recognition
Traffic sign-based speed warning
Available settings:
Trailer-specific speed limits
You can switch the visual and acoustic speed
warnings on/off in the Driver assist menu
ðpage 134. If you have configured the program-
mable steering wheel button accordingly, press
the button on the multi-function steering
wheel.
Important: The automatic trailer recognition
must be activated.
You can display speed limits which apply specifi-
cally to vehicles towing a trailer.
Maximum trailer speed setting (km/h)
1)
Applies to factory-fitted towing brackets only
169
English 
