Right I thought I would share my experience with you incase you're having the same problem..
About 8 weeks ago on the M4 I got a great big crack in the windscreen.. National Windscreens eventually turned up a week later with a beautiful green tinted glass unfortunately it did not match my blue tinted one.. after saying they have to get if from the dealer.. and numerous calls they eventually fitted a clear heat insulated windscreen to my GTI

I have now complained and they say no such glass exists.. I checked the vw website which quote "The GTI derivative of the Golf Mark 5 comes with a huge array of standard equipment including, ‘Monnza alloy wheels, front fog lights, halogen clear headlights, heat insulating blue tinted glass, rear roof spoiler, aluminium and leather finished interior features"
http://www.volkswagen.co.uk/used_cars/models/golf_mk5_hatchI also called VW parts and gave them my chassis number and they say its a green tinted glass not blue.. but I know its blue I can see it!!! So now I'm awaiting a call from the National Windscreen's Manager who will check the colour of the glass on Monday.
Any advice would be much appreciated.. I'll also keep you posted on my progress with replacing my windscreen with the wonderful blue tint.
24-April-2006... been on the phone with National Windscreens and my insurer.. National Windscreens insist that they have fitted the correct colour windscreen according to the chassis number.. anyone know whats my best option on getting a part number for the GTI windscreen?..I've checked in with my local VW parts dealer and they told me my chassis number matches a green tint!!!