Ben McCann
New member
I've got a 2013 c600 with about 4000 miles on it. For a while, I've noticed grime and grease on the swing arm in the back. It appears to come from the vent area and congregates around the bolts. Here's a photo. I live up a gravel driveway, so pay no attention to the dirt. It's the oil/grime I'm concerned about. Should I be?