3FA - Without roof insert (standard roof) [DEI - Roof insert/convertible top] 3FB - Spoiler roof [DEI - Roof insert/convertible top] 3FU - Big roof system [DEI - Roof insert/convertible top] 4X0 - Without side air bag [SAB - Side air bag] 4X1 - Side air bag front [SAB - Side air bag] 4X3 - Side air bag front with curtain air bag [SAB - Side air bag] 4X4 - Side air bag, front and rear with curtain air bag [SAB - Side air bag]