I've experienced the same event. I'll be driving along and the word BRAKE appears in the driver's information panel for seemingly no reason. Can't figure out whats activating it. I'm not that close to another vehicle.
Per the owner's manual, the CMBS will give that "BRAKE" flash warning when going around curves (even slight curves) or going over hills/changes in elevation. There's a particular spot on my commute each day where it will consistently give me the "BRAKE" warning, and I think it is because I'm going around a slight curve and the radar sensor sees the car in front (traveling the opposite direction) and "thinks" we're going to crash. Its a minor nuisance but I appreciate having the system there for emergencies.
