Playing Muisc in the new A1

My wife has a VW Polo at the moment and is thinking of changing to an A1. In her Polo she uses an iPod Nano in a cradle on the dash.

On the A1 she test drove yesterday it did not have an interface for a iPod but I did notice a SD card slot. If she was to load music onto an SD card, can this be controlled usnig the normal radio/CD controls.

Also does anyone know if there is an iPod interface available for the A1.

Thanks.​