254
Driver assist systems
ACC system switched off
This information screen 'ACC system
switched off' is active on the master
display for a few seconds when:
– The vehicle speed drops below 25
km/h (16 mph).
– The ABS/ASR control or the VSC
system is activated.
ACC system reduced performance
If ACC uses the service brakes
frequently over a long period, this
information screen 'ACC reduced
performance' can be active on the
master display.
This situation occurs for example during
prolonged downhill driving.
If braking is still needed, the driver must
take over control by for example using
the service brakes.
NOTE: When no action is taken, ACC eventually switches off and the
information screen 'ACC system malfunction' might appear on the master
display.
ACC system warning
The 'ACC system malfunction'
warning is activated if:
– A general ACC system malfunction
occurs.
– The vehicle air pressure drops
below 6.5 bar with a vehicle speed
that exceeds 15 km/h (9 mph).
Iif ACC is switched off, cruise control
can still be engaged.
Adaptive cruise control
system switched off
D002165
ACC reduced performance
Adaptive cruise control
system malfunction
DW63246305.book Page 254 Friday, March 22, 2019 4:54 PM
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