Volvo S80 Owner's Manual page 166

04 Driver support
Distance Warning*
Symbols and messages in the display
Symbol Message
Radar blocked See manual
04
Collision warn. Service
required
*
164
Option/accessory, for more information, see Introduction.
Specification
Set time interval, during adjustment.
Set time interval, after adjustment.
Distance Warning temporarily disengaged.
The radar sensor is blocked and cannot detect other vehicles, e.g. in the event of heavy rain or if slush
has collected in front of the radar sensor.
Read about the limitations of the radar sensor, see page 158.
Distance Warning and Collision Warning with Auto Brake fully or partially disengaged.
Visit a workshop if the message remains - an authorised Volvo workshop is recommended.