How do you replace the rear right hand side reverse light on a 2002 Audi A4 have attempted to remove the lining but a clip holds it in place there seems to be a red tag across the back?

you dont have to remove the lining. when you open the trunk you will see 2 little round covers(one on left one on right) pop these covers off it will give you access to the screw that holds the tail light assembly in place. remove that screw and pull out the tail light assembly, once you do that you will have access to all of the bulbs in the tail light.takes about 5 minutes.