Hello! I know this was an issue for many of the 21 L's, but it didn't really happen to mine until a month ago or so. I'm constantly getting the "Blind Spot Alert Unavailable Service Required Error'. I took it to the dealer, but of course they couldn't replicate it, even though I have a video. As far as I know, I've done every update there is, as did the dealer. Does anyone know if this issue was resolved? I find that if I immediately drive or put in reverse from starting, that it happens less frequently. Thank you.