My 2007 Mark LT
#16
I have the avn 5500 too...its simple...just leave one wire not grounded I believe...its in the manual...it says, "IF YOU DO NOT CONNECT THIS WIRE THE PRODUCT WONT WORK LIKE IT SHOULD" meaning it should ONLY play dvd's in park, but lets get real...lol...just leave whichever wire it specifies not connected...its that easy