why do my rear head rests deploy? no bumps nothing on 2009 Mercedes-Benz CLK350

they go up and hazards come on. No reason why. Was at dealer and they have no clue

Asked by for the 2009 Mercedes-Benz CLK350
Was the car in an accident before.Possibly a prior repair not done right.Are you talking about the air bag in the head rest.Sounds like a software issue.Call us if you would like it checked out.Ambler Tire 215-646-9150.We use the xentry diagnostics for Mercedes.