The Window aperture consists of two parts . The inner separate piece and the side of the car. On the production line these parts are mated together with a glue and these "rivets". They do NOT have anything to do with the glass window and MUST NOT BE REMOVED.I suspect the "rivets" were used on the assembly line to hold the separate inner window frame to the outer side panel and not for holding in the glass. It is important that all traces of the old bonding is removed from both the frame and replacement glass. The surfaces both need to have a special primer applied before the bonding glue is applied. The window then need to be fitted correctly and pressure applied to ensure it sits flush.
side panel, inner<br/>side member<br/>wheel housing liner Audi A2 (A2) 2003 year Audi EUROPA 809030 spare parts
No2 is the inner part of the frame
side part<br/>sectional parts for the side section Audi A2 (A2) 2003 year Audi EUROPA 809050 spare parts
No1 is the outer skin.