Hi had my Micra a couple of weeks now and nearly all little problems solved apart from a couple, first one is my biting point on my clutch is very high somebody at college told me my clutch is going to give up but its not slipping or anything? Second one is drivers window keeps coming off rail when winding up, dad has stripped door cover off and runner has only got one roller in not two and the one in it is broken. Does this mean a new mechanism or can i just buy the rollers? Cheers Stacey..