Ok.... i have a 07 charger. i have the AVIC-Z2 and i have steering wheel controls. I know i need the PAC SWI-PS. Does anyone know if i need the SWI-CAN and C2R-CHY. I have have been talking to a guy who has the Z1 and installed all 3 units. I talked to someone else and they said all I need is the SWI-PS. any help please.....

you most certainly need the swi-can and the can bus harness for the car. you can get by without the can harness if you dont care about illumination or dimming the unit at night and want to run an accessory wire to switched power.