Can I connect a sony xperia z to a new ford ka via USB?

Wonder if anyone can help. I've just bought a brand new ford ka zetec which I'm really happy with, but unfortunately the USB port doesn't want to play the music on my xperia z. I don't have an auxiliary port unfortunately so I'm hoping to make the USB work. The girl in the garage where I bought the car plugged in her iPhone and the music worked perfectly and immediately. Is there any way I can get my music through the USB? It charges the phone, and connects via bluetooth to make and answer calls, but I nave a feeling it's only going to like apple products.

The usb on the sony xperia is only for charging.
if the music on your phone is on the memory card then use the adaptor provided with the phone and plug that In to the usb port and use the radio controls to play the music