Thanks Benzyle for your reply. My cover has the bottom "bar" completely gone and part of the "vertical supports" on both ends damaged. I have thought of making a form and having a fiberglass part made and attached as a replacement.I can't answer specifically ,,but the C55 essentially has a CLK w209 front end and if a 209 part came off ,,that is what I would use..
Variants may have or not have , lamp washers and or parktronic sensors...
Bumper covers can be repaired if they are not totally smashed...I repaired two big cracks on mine ,,much cheaper than replacing it..