Right, so over the summer my drivers side window started squeaking in the most annoying fashion possible and has only got worse since... Tried squirting a bit of silicone spray round the seals but this did nothing. Upon doing a search there are a few threads with people describing the same problem all with a list of people also compiling about the same problem but ultimately no one with any solutions. So I thought I'd have a stab my self! Firstly, here's a short vid of exactly how annoying the noise was: !WARNING! Some viewers may find these noises distressing! See!? . . Right, and here's how I fixed it... First, remove the door card. To do this remove the hidden screw in the door puller, slip out the insert in the handle and remove the 2 screws behind it. Remove the 2 screws either end at the top and then lift the door card out. Detach all the cables and etc a put some where safe... You will also have to remove the window switch so you can actually operate the window! Now, see that little blue runner I zoom in on in the video? There's a wire that runs up and down with that which goes round a pulley at the top just behind the door pin... Cake the wire in a thick grease (I actually uses vaseline) when the window is up and down, also take the inside window seal out to allow access to this pulley and use a scraper (knife will do) to smear grease into this pulley while going up and down with the window. Wind the window fully up and down a few times and that should be the end of your squeaky window woes! Hope this helps as there seemed to be quite a few people with the same problem!