Hi I had my stereo stolen a few months ago which was a navigation with the screen. I have recently bought Audi concert stereo,  which has less plugs, can I just plug this in or do I have to take it to an stereo specialist 

Hi Michelle....welcome to the Forum

Bad news about the stereo theft...thought that was a thing of the past as most systems are security coded to the vehicle.

I think for that reason, you would need to code the replacement one into the vehicle.

Maybe worth checking out these sites for options.

http://www.advanced-incar.co.uk/

http://www.iceboxauto.com/audi

Let us know how you get on with sorting it out

Cheers   Trevor