t's hard to tell - we've not bothered investigating yet because it goes away once the car's warmed up. What's the well known problem and fix? If it means taking the dash bits off, we might just wait until we get our hands on a new stereo and sort it then... I don't have the torx screwdrivers yet.MY old lupo gti used to do this only when the heaters were on full to the windscreen ,it was causing the plastic dash to expand slightly when it got realy warm,turning the heaters down slightly stopped the noise.