See also:

External audio source volume
If an external devices such as an MP3 player or an iPod is connected to the AUX socket, the device's volume may be different from the volume of the internal sound sources such as the disc play ...

Overview of Bluetooth® controls
Center console control panel 1 VOLUME: the buttons on the steering wheel keypad can be also be used. 2 Display 3 ENTER: press to answer an incoming call, make menu selections or activate the p ...

Driving Dynamics: Engines
The Volvo S40 is available with a range of high-tech engines that reflect its role as a premium alternative. Three new engines joined the range in 2007: a 145 PS 2.0-litre petrol, a five-cylinder ...