Winterschläfer / Winter Sleepers (1997)

Young blonde translator Rebecca lives with her boyfriend ski instructor Marco in a mountain villa owned by her friend, nurse Laura. Rene, local cinema projectionist, steals Marco's car and gets into a car crash with local Theo, whose daughter, after being in coma for a time, dies. Rene suffers from partial short term memory loss and starts a relationship with Laura. Meanwhile Marco is looking for the man who stole his car and Theo - for the man who killed his daughter…

Imdb