I've had my VZ Exec Wagon. For probably 6 months n can't work out the origins of the stereo. The problem is I couldn't get sound to come out of the rear door speakers, then I try to fade it to the back but finding out there was no fade option. (WTF) there's only the 2 fronts!!?? Then someone suggested someone has put a utes unit in. Can someone she'd any light. . Am I supposed to have a 4 speaker stereo or not. The colour of the face is black.. Cheers Martin