has anyone got a clue how to change the rear wiper blade on a Leon? went to a well known motor accessories shop today, bought the blade and payed them to fit it but after ten minutes they said they didnt know how and didnt want to force anything just in case they broke it and also said to bring it to my main dealer (which aint gonna happen). anyone know of any guides etc. i did try a search but i'm new to the site so not completely familiar with how everything works just yet...