The passenger-side shoulder belt has a retaining device that is supposed to be attached inside the headrest. Ours fell out. I have attached the picture below. Does anyone know if a piece is broken off the upper metal tab? The lower pice does have that 'L' shape, like it's clipping to a bracket inside the headrest. I had an upholstery shop try to re-fit it, but it would not stay in. The dealer says this bracket is Smart part number 451 860 00 22, and it's $146!! If it is broken, I'll buy it, but the parts guy's illustration is not clear if it's supposed to have an extra piece on it. Thanks!