had similar probs where i would report a problem and all theyld do is stick it on the poxy machine then give me a list of things that needed to be sorted, didnt find a decent pug dealer to go to, and smaller local garages just got pissed of with the car cos most of the parts where main dealer only so they would end up having my car sat there for a week or more, which just pissed them off more and cost me in the end!
as for a decent renault garage, im a afraid im a bit of a masacist, my sis had a reno 19 16v cab which was almost as bad as my s16 in terms of reliabilty, but i basically spent 3 years battling them to sort that out everytime it went wrong.
but when i got my 172 i only bought is cos me local dealer which was a franchise was taken over by reno uk which i thought would mean they would now know about the cars. but alas ive had my 172 for 4 months and i have fallen out with the garage agian because my car has been in to them 3 times in the last 6 weeks to have the screenwasher bottle replaced but they keep getting the wrong one in!!! aahhh!!, so now im also looking for a decent garage!!
oh, i forgot to say im in north london, so i would know of any garages near you but if you post a message on here im sure youll get some joy.
tubs