Hello, you need your help. I want to buy a removable trailer coupling on my V50. Now there is a choice between Bosal and Westfalia. Can someone give a tip which coupling is better or worse? No cut-out in the bumper is necessary with the Bosal, at Westfalia it is necessary. At Bosal I have to have the car programmed at Volvo, at Westfalia not. I already know that much. Greeting Christian