Hello, I am interested in installing a pioneer z3 double din nav/dvd system in my 2002 s-type 4.0. There are just a few things that are concerning me, and I figured this is the best place to get answers. I was wondering if this system can be connected to the steering wheel controls, is there a specific harness I need or can it be wired? Also, i am assuming the factory amp, cd changerand speakers have no problems working with the system? any help would be awsome, thanks for your time