Hi. Has anyone had this problem recently? My rear brake lights (not sure what high level brake lights means) are coming on in the middle of the night and if I don't see in time the battery is going flat. The garage can't work out what's wrong. They did a diagnostic and found that the horn alarm isn't working and wondered if this is causing something funny to happen with electrics. That will cost £150 to replace. if that doesnt work they were going to send the ICU off for analysis. But sounds like it could be a different problem as people here seem to be describing something similar - brake lights coming on at night, usually on very cold nights, which can drain the battery. Pressing the brake pedal seems to turn them off. What should I ask my garage to look at? Thanks