The rear seat belts are faulty. I had to pay out of pocket for the rear middle seat belt repair and now the rear right side is faulty and does not budge or move pass a point. I am concerned that each time these do not work, I will be out another thousand dollars for repair. Seat belts on some of my oldest cars continue to work. This should not be happening especially to a newer vehicle. I need help and by that I want Mercedes to cover the cost. It’s very stressful. Thank you for hearing my concern.