What are "Euro" mirrors?

Actually, the technical term is "Aspheric"

They should have been standard equipment on the TTR.
Go here to see a technical description of how they work.
Ignore the 'Boxster' content.
He does have some good install instructions that will work for the TT also.

The Boxster Aspheric Mirror Page

These are the Audi Part Numbers;

Any dealer can order these.

8N0 857 535 A left

8N0 857 536 A right

Here is a picture form the back side.

Here is a picture of them installed on my car.

By Jeff Bipes