we bought a used car back in february which we bought for from a used car dealer for £3800 with 3 months warrenty, it was serviced and MOT at the time we only had it a week or so before we started to have problems with it so we took it back to the place we bought it and they said they would repair it, while it was under warrenty we had it back to them several time because we kept having problems with it, loss of power, electronic fault on dash etc, etc each time we took it back they said it was fixed when we went back to pick it up when we kept getting problem with it we told them we werent happy and the fact that we had paid money for a car with problems, in the end we took it to renault and paid for them to do a diagnostic to find out the problem was several faults came up so we took it back to the dealer they didnt offer us our money back just said they would sort it and continue to repair while it was under warrenty, the last time we got it back which was just before the warrenty ran out it seemed to be all fixed, then about 2/3wks after the warrenty ran out electronic fault came on dash board so we took it to the garage we use and trust who found it was the pencil coils needed replacing even though they had already been replaced under the warrenty, so we paid for them replacing and hoped that would be the end that was about 2 weeks ago well that wasnt the end of it electronic fault has been back on the dash board since, so now we are going to have to take it back to our garage again to find out whats wrong with it at our cost. we are at a loss as to what to do because we dont know if we have any rights regarding the used car dealer who has obviously sold us a pig in a poke and we feel we have been ripped off, so what can we do ? help please.