Roll Control RSC
WARNING: This page is about a different car, the 2010 Volvo V70, 2009 Volvo V70, and 2008 Volvo V70. However, it is still accessible from the selected car via links, so may be relevant.
Roll control RSC (Roll over stability control) is a function that monitors the vehicle's angular speed.
If the driver suddenly turns the steering wheel, e. g., to swerve, and the vehicle tends to roll, the angle sensor registers the speed of the angle. The vehicle is stabilized using the DSTC-system.