OK, I understand your problem, so I'll try to get you through, step by step.
1) Take off the bolts on the bottom
2) Take off the clips on the top
3) Grab the dash from behind, putting your finger in one of the screen bracket holes
4) Pull, but just until you hear "pop" and stop there
5) Put your finger behind the dash, in other of the screen bracket holes
6) Pull, but just until you hear "pop" and stop there
7) Now, the dash still feels "connected"
8) Put your finger behind the ODO, through the opening on the dash you've made on the top by pulling
9) Push the ODO from behind, it's simple, it will pop out, it just has one pin on the rear inserted into rubber grommet
10) The dash is free, disconnect 2 connectors
11) First remove the rubber boot around large connector
12) Then there is the clip on the side of the connector that you need to press and disconnect it
13) Then small connector
14) You need to insert small screwdriver into the clip hole in order to disconnect that one
15) The dash is free now
I use two thick rubber washers on the pin behind my ODO because, by time, it gained some slack and started to shake. The idea came from my dealer and it works 100%. It feels like I have my ODO nailed into the dash now.
See if this helps and ask for more help if you need. I'd be glad to help.