Yes, but it was installed by the dealer. The T5 does have the wiring built-in already, however, in order for the radio to control the remote changer you have to put in a software modification into the radio. This requires some special tools and also means that the serial data interface to the aftermarket CD changer had better be an EXACT match to the dealer-installed unit otherwise it won't work.
I know it's no help, but my cd changer works very well. Good luck