See also:

Horn
Horn - Press the steering wheel hub to sound the horn. ...

Changing the set speed
After a speed has been set, it can be increased or decreased by using the or buttons. Each time one of these buttons is pressed, the vehicle's speed changes by 5 mph (approximately 8 km/h). ...

Climate system maintenance
Special tools and equipment are required to maintain and carry out repairs on the climate system. Work of this type should only be done by a trained and qualified Volvo service technician. ...