1999 Roland Garros 206 radio problem

[n11xxy]

Hi
I am new to this forum and I hope somone can help and point me in the right direction.
We bought a 1999 Roland garros 206 for my daughter for her 18th a couple of months ago.
Now my daughter has passed her test she wanted something better in the car or the one thats in to work properly, it currently has a peugeot 2030 radio cassette fitted. The radio reception is very poor, it picks up only 3-4 stations on a FM search. I thought it might have been the ariel connector on the back of the radio, so I took the radio out, and connection is fine. so maybe it is the ariel on the roof? but i'm not sure how to get to it, the ariel it is at the back of the car roof and is a sporty flexi ariel, Do I need to access it by taking down the roof lining?
Also the steering wheel control stick doesnt work the radio and also there is a Clarion multi CD changer in the boot but this doesnt work either? will this radio accomodate the multi changer? if so how would I do it? and how do I get the steering column lever to work the radio?

Hope this makes sense

thanks for any help

Mark