Volvo V90 TWIN ENGINE Owner's Manual page 344

DRIVER SUPPORT
Recommended radar device
maintenance
In order that the camera and radar unit shall
function correctly, the windscreen in front of the
unit must be kept clear of dirt, ice and snow, and
be cleaned regularly with water and car shampoo.
NOTE
Dirt, ice and snow covering the camera and
radar unit will reduce its function and may
prevent measurement.
This may mean that functions are reduced,
deactivated completely or give incorrect func-
tion response.
Related information
Radar unit (p. 338)
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342