In a prospective multinational (Germany, Italy, Belgium) randomized single-blinded treatment trial patients with proven posterior canal BPPV – according to the diagnostic criteria of the International Classification of Vestibular Disorders – were randomly assigned (1:1) to the “SM” or “SM+”. The latter is characterized by an overextension of the head/body by 45° below earth horizontal line during step 2 of the maneuver. The first three maneuvers were performed by the physician. The patients were then instructed on how to do the maneuvers which they should perform 3times in the morning, 3times at noon and 3times at night.  Each morning after the first maneuver of each day the patient documents in a standardized evaluation sheet, whether vertigo occurred or not. The primary endpoint was: “How long (in days) does it take until no attacks can be induced “in the morning” by the maneuvers?”