Cd Player/ Sat Nav

[pez]

I own a W reg 1.8vvti Avensis Estate, and was wondering if I am able to replace my current Cd player with an aftermarket product, while being able to retain control of the steering column functions and Sat Nav facilities that came with the car?

[Zheck]

Hi, I am interesting in this moment too. I want change OEM CD player on 2DIN Multimedia station with NAVI, and may be any do this changes and can provide any expirience, how to do this thing. I have some question for this work:

Do I need some additional wiring to do?

How to connect buttons on steering?

Where can get facies for instalation?

Thank you!