I have an Alpine 3DE-7886S with 3 in-dash cd changer in my BMW Z3. I need to know how to pop out the dash surrounding the head unit and also the head unit itself. What tools/keys do I need and where can I get it from, are they availble online? I tried to remove the dash surrounding but this thing doesn't come out, I used 2 knifes (with tape) and I also tried using a pry tool but no luck.. I checked installdr.com but no docs for BMWs!!