A friend gave me her CD changer out of her mid 90s VW Jetta before she traded it in, and I am going to install it in my 01 Audi A4, but the connector
on the CD changer and the connector in my trunk are different. The CD changer has a rectangular connector (almost like a serial port connector) and the trunk has a round connector (almost like a USB connector). Is there an adapter I can get at Radio Shack, or am I going to have to screw around with the wiring?

Any help would be greatly appreciated.

Thanks,

C-Dawg