I experienced the front radar issues as well.
- System Malfunction, See Owner's Manual error with AEB light on
- Function Unavailable, Front Radar Blocked error with AEB light on
- Emergency braking when there was no emergency
This started soon after I got the car, but was happening maybe once a week, so I didn't do anything for two months.
At the point I brought it to the dealer, it was happening reliably every time I used the car for more than a few minutes.
The dealer performed a "reset front distance sensor" and returned the car, and it's gone back to only happening very rarely. I did some 2-hour long drives with perfect ProPilot performance for example, but still have occasional false emergency braking and AEB disabled lights.
I suspect it does have to do with condensation because I had taken the car through an automatic car wash before the error rate went way up. I'm not doing car washes any more, but kinda still expecting the problem to come back, I assume they'll just replace the radar next time. There's nothing in the owner's manual that says not to wash the car in an automatic car wash, or that it may affect the radar, but it seems too coincidental to me.
AEB can be disabled in the vehicle Driver Assist settings, which I do whenever it's acting up, then I wipe down the nose of the car to make sure there's nothing actually blocking the radar. It's pollen season and builds up thick.
Build date is 01/18, Smyrna USA.