Hello to all the mini cooper owner, I am new to the world of cooper and forum, and just got a few question for you fellas to help me out on.
Quick info: 2012 mini cooper countryman s4 all, 6 speed, just got it last October, my location is Massachusetts, haven't done much, other than change interior led and changed headlights to a 6000k. My questions are,

1) one day it rained a lot and noticed the passenger side got flooded with water, my friend and I checked the drainage on the sunroof and noticed it was clugged, we cleaned it and all is good so far, but now I hear a whistle when I am over like 50mph and I think is from the sunroof but not sure.

2) my friend has a bmw and has bimmercode and we did a few things with it on the cooper, when I try to do the windows/door section (FRM part of it) it gives me a critical error about the footwell Module, anyway I can fix this with out paying a lot of cash?

3) I am trying to upgrade the radio and noticed a few threads here about it people getting android radio, looks amazing, my question is, I see some of those radio shows Android 8,9 or 10, if I get one of those is it possible to upgrade the versionto latest and I am able to update the GPS with SD cards or wireless?

4) the foglight work and all but when I get very close looks like sand is inside, half way up 🤦🏾‍♂️. Do I have to remove bumper to get that clean? Does it happen often?

Thanks for the help in advance and sorry if is a long thread or wrong section. New to all this car forum and first post!