Wipers do not keep windshield clear in winter snow and ice driving conditions. wipers freeze up and do not clear windshield, seriously compromising visibility and causing dangerous vehicle operation. design is proprietary and audi do not offer winter blades to remedy this situation. please note, this is for an audi a4 quattro, not q5 as your web site only acknowledges the a3 and q5 as choices for vehicles. *tr