Audi A4 1996 Tail Lights??

This sounds like a stupid question but I can't figure out how to change my Tail Light on my 1996 Audi A4. I can pull the "Lighting Cluster" off but that only gives me access to the Brake, Blinker, Reverse and Fog Light. there are two wires going from the Cluster to the light embly that goes to the Tail Light. The only problem is you can't get to the light from the backside and I can't pull the Tail light / embly out the little hole it is stuck in. I took the whole Light embly out but the light embly can't be seperated from the back part of it which is plastic and has some kind of Adhesive sealing the two. Any Ideas on how to change the Bulb? Its very frustrated because I have a "Haynes Manual" and the Owners manual and it doesn't show these tail lights it shows the Brake and Tail light as the same bulb. HELP ME PLEASE!!!! My inspection is coming up!!!!!