hi does your golf have a sunroof if so its coming in from the 2 holes in the sunroof as did mine a golf mk4 1.6 2001 the easiest way to solve it is by buying a can of compressed air for around £8 from a pc shop or camera shop have all doors open and then blast the two tiny holes in the sunroof and you will see the muck thats built up over the time in the door in the door you will see a rubber bung first try sqeezing them to see if any muck comes out of them when you have blasted the two holes in sunroof pour some hot water down the holes and that will solve your problem
steve clarke, February 2008
