Volvo XC70 Owner's Manual page 184

04 Comfort and driving pleasure
Distance Alert*
Symbol Message
Radar blocked.
See manual
Collision warn. Service
required
04
*
184
Option/accessory, for more information, see Introduction.
Specification
Distance Alert temporarily disengaged.
The radar sensor is blocked and cannot detect other vehicles, e.g. in the event that heavy rain or slush
has collected in front of the radar sensor.
Read about the limitations of the radar sensor, see page 178.
Distance Alert and Collision Warning with Auto Brake are fully or partially disengaged.
Visit a workshop if the message remains - an authorised Volvo workshop is recommended.