See also:

Putting ACC in standby mode
Before ACC can be used to regulate speed and/or the distance to a vehicle ahead, it must first be put in standby mode. To do so: Press . The symbol appears in the display and parentheses (---) ...

Temporary deactivation
The driver can temporarily deactivate cruise control by pressing 0. The saved speed is shown in brackets in the information display. ...

Accessory installation
• We strongly recommend that Volvo owners install only genuine, Volvo-approved accessories, and that accessory installations be performed only by a trained and qualified Volvo service technician. ...