You don't indicate the car you drive. However, most of my reading shows one of two actions by other owners.
1. Buy the whole benz unit - carrier and top piece. The owner reviews of the benz unit have been favorable.
2. Buy the benz basic carrier and another manufacturer's add-on part. I believe many winter sports folks have added Thule racks to the carrier.
Your local bike/ski shop can better tell you if they have systems to fit your specific vehicle. As of September, no bike rack manufacturer made something for the C230 Coupe (at least not to attach to the hatch). This was per a bike shop I visited.
1. Buy the whole benz unit - carrier and top piece. The owner reviews of the benz unit have been favorable.
2. Buy the benz basic carrier and another manufacturer's add-on part. I believe many winter sports folks have added Thule racks to the carrier.
Your local bike/ski shop can better tell you if they have systems to fit your specific vehicle. As of September, no bike rack manufacturer made something for the C230 Coupe (at least not to attach to the hatch). This was per a bike shop I visited.