I am the proud owner of a brilliant blue GLC 300 for the past year. I am looking for recommendations on a bike rack for the roof. I have learned that a hitch mounted rack will block my rear view camera (I also don't have a hitch installed). I have rails on the roof of my car and the pictures of the rack in the MB accessory catalog shows a rack mounted to a bare roof. Anyone out there have a MB rack mounted on rails or do you have a Yakima/Thule, etc rack?