A couple questions about my new E53

[phathom]

First off, new user here, but been on another bmw forum for 9 years. Hi everyone. I recently got an E53, formerly an E46 owner. I have a few questions.

1: It came missing two climate control buttons. Is there something supposed to be under these or is it just the cap? I don't know if I just need new caps or what. I can see the light straight through and no indication of a type of switch/spring in the hole.

2: I have the non DSP widescreen nav on mine. I ordered an aux in adapter for it for now. I'm looking at getting the Eonon replacement for this to get a2dp, updated nav, usb, etc. Do I need to do anything to prevent losing any OBC functions? It looks like all settings for it are controlled through the nav unit itself and not adjustable with the steering wheel stick. Is there any issue with this?

3: One angel was burnt out. So I bought some 3.5W cree LED replacements. I can see them at night with the HIDs off, but that's about it. I'm wanting to order the large 20W cree LED replacements for it now. Similar to the MTecs. Will these let me see my angels in the day?

Oh one more thing. My bluetooth sounds great to other people, but sounds like absolute crap through the speakers. Is there a fix for this until I get my new head unit? Everything else sounds great through the speakers, just not bluetooth calls.