On trying to change the bulbs behind the climate control unit I followed the instructions that were in the manual. I got the head unit out and according to the manual there's only one screw (see picture) holding in the Lshaped climate control unit. I removed that, sprayed some silicone oil around, and GENTLY tried to pry it but lo and behold the face cracked just to the right of the rear defroster button!! is there by any chance another hidden bolt somewhere? Obviously not worth breaking a $600 part just to change bulbs.
UPDATE: thank you for these video postings Although I'd seen some, I did not previously see the full dash removal video. Thank God I don't need to do that, but it looks like it would be necessary to remove the framing around the clusters in order to truly free up the L-shaped climate control unit. I'm going to try it this coming week and I'll let you all know how it goes. Thank you so much for your advice!