I have a freelander 1 with radio/dvd and the harmon kardon amp and speakers. Oh it also has the satnav too. However looking to replace it and fit a new stero with iphone connector. Is it possible to just take out the current radio, fit new harness and radio? Will it still use the harmon kardon...

I have a 2003 Freelander with the becker satnav system. however i am having some problems with it and im hoping someone might know how to fix it! I replaced the roof module as it was not working, and for a while after no problems with the satnav. Recently its stopped working? Set it to take me...