Came across this on the Audi TT forum and thought I ought to share it with you guys......makes sense in the unfortunate case that you have an accident.
It is basically a standardised A4 "rescue sheet" including information on the location of cabin reinforcements, tank, the battery, airbags, gas generators, control units etc. - and indicating adequate cutting points must be used throughout Europe. some manufacturers and importers have made such rescue sheets available on the Internet. This information must be provided throughout Europe. To be readily accessible by rescuers, the rescue sheet must be placed behind the driver's sun visor of each car.
The link below explains everything in more detail..
Rescue sheet on board - helping the rescuers - Rescue sheet