With the DIP positions all UP (default setting), I got sound through the system, but no control form either the steering wheel, radio unit or the IPOD. When I changed the car setting DIP position, I can control selection through the IPOD but no text display on NAV. Volume control works on the steering wheel and radio unit, but I can not select playlist, song or artist except direct from the IPOD. This is the setting I have kept so far, but it is far from adequate.

It was a straight forward install, so I am baffled. Can you suggest anything I should change?