As for the radio code it should not be a prob as long as you smile. A tip is to write on the radio what the code is, i know this sounds a bit stupid, but who is going to want to steal a head unit that is no good without the seperate display.Try making a 6 digit number..and you know that its the last 4...first 4..etc...
They may require the head unit, to take the number off the back as the head unit might of been swopped. This happends when the likes of me goes and buys a used car...(Im like,...i want a cd player...that cars got one.....can we swop it..)...
As for the warranty..? Did you buy the car from a dealer..as im not too sure on how you stand with the warranty from a private sale car..i heard from a mechanic mate...ex ford, that you lose the warranty..? Dunno..but be cautious when entering that era....i got a 02 clio..and i got 3 yrs warranty...so i cant see why you got 3 yrs....
As for the other post with the steering prob...my old car was a XR2i, and i knew how you feel with the steering..on them and the clio, they call it Speed related steering..the faster you go, the lighter the steering. Well sort of a nightmare for me, as mines been in for steering, as when you take your hands off the steeriing wheel @ 70mph in the outside lane, within 5-6secs you in the hard shoulder..explain that to the renault blokey..he goes out on a 30mph test drive....naa thats ok matey......
Get them out in the car with you driving and do a hands free experiment.... a rattle is a rattle, i had a wheel bearing change...sort of a wheering noise...and louder under braking...
My clio is a Aug 02..