DNX6990HD DNX6490BT DNX5210BT DNX5510BT DNX5310BT DNX5310BTM DNX5190 DNX5060EX DNX4210BT DNX521DAB DNX4210DAB DNX4310DAB DNX649VBT DNX521VBT DNX531VBT DNX531VBTM Be sure to read and follow the instructions in the "2012 Navigation/Multimedia receiver Firmware Update Guide." "2012 Navigati...