Sorry for not responding, but I was driving all day. Terrible weather, but the Benz handled it splendidly. I don't drive the car all that much but every time I do I'm reminded of what a great car it is.

Anyway, upon further inspection my description of the marks probably wasn't as good as it could have been. There's a plastic trim piece on the front part of the engine, and the mark is on that. Also, it looks like the mark is from the top part of the fan shroud hitting the plastic trim piece. When I head back home in a couple days I'll take a picture and post it on here.

I've noticed that the clips don't want to stay clipped; it seems that even after a short drive (or sitting in the garage) they work themselves out a bit. What do I need to do to take care of this?

Thanks,
Mike