See also:

Compatible file formats via the USB socket
The following audio and video files are supported by the system when playing a device connected to the USB socket. ...

Vehicle Overview
Volvo's smallest sedan, the compact S40, comes in 2.4i and T5 trim levels, the latter offered in all- as well as front-wheel drive. A few years past a full redesign, the S40 and its V50 wagon sist ...

Input volume
Adjust the input volume in the RSE menu, under A/V AUX input volume. ...