I have a Renault Megane Scenic, R reg and it's got an 'inhouse' tape player
and radio with a 'stalk' where I can operate the volume and radio channels
from the behind the steering wheel with my right hand.

It crackles a lot and I wondered it that would be fixed by having a new
CD/Radio.

Does every new CD/radio have wires at the back that will allow me to link up
to the 'stalk' thingy?