Hi David...Our 2009 Presara had the same if not similar head unit..I have seen some posts about adding an aux cable for unit I think some threads on here and some on U-tube..
However when it comes to wiring up such a beautiful ride I went to a Monster Audio shop here on the central coast and had them install a nice Clarion unit which had a few instant smiley results..a much more reliable unit as far as sat/nav, all the wheel functions apart from phone buttons work,a great sound system, 2 xUSB cables available for flash drives for my fav's...I would never have tackled it myself as I didn't want issue after issue..However if you feel you can handle the wiring required then read here for advice or as i said maybe U-tube.
Hope you get some joy
KAA