Which nav screen do I have? And how do I remove it?

[Multibeemer]

I know this is a dumb question, but I don't know the first thing about automotive electronic components, but I'd like to see if I can remove my nav unit, but the instructions for removing it are different, depending on whether you have the 16:9 or the 4:3. I assume these numbers refer to the relationship of the width to the height of the unit. My screen measures 14.5 cm wide by 8 cm tall, which gives a ratio of about 1.8:1, which is close to 16:9, so I assume I have the 16:9. The car is an 03 4.4i, and it doesn't have a phone or bluetooth.

As I've discussed in other threads, I've isolated a massive (1.4 amps!) parasitic current drain to the navigation system. This is the amount of current flowing between the connectors of fuse #75 in the right rear cargo area fuse box. There is no other current drain source anywhere else in the car, so one of the modules of the nav system must be the culprit. To see if I can further isolate the source of the leak, I'd like to see if I can remove the nav unit and see if I can identify the module with the problem.

Assuming I have the 16:9, the instructions in the "How-To's" section of this forum say to simply unclip the frame of the unit by (I assume, based on the picture) pushing in the upward direction on the frame. Then undo four torx screws, and pull out the unit. I've tried pushing upward on the frame, and haven't had any luck unclipping it, or getting it to budge. Is there a trick to getting the frame unclipped?

Here's a picture of my unit:



Thanks.