Audi A6 S6 C7 4G 2012 Tow bar trailer hitch control unit module ONV23419. Audi A6 S6 C7 4G 2012 Tow bar trailer hitch control unit module ONV23419 4G8907383. This product has been used before, and while it may show some signs of wear on its surface, it is in good working condition and performs […]