This is good information, I got a CPO'd '05 C230K a few weeks ago with just over 50k miles on the odometer. I had a slow day at the office so I decided to wash it while I had my coffee outdoors at 79 degrees F. While wiping down the engine compartment I looked and saw this.
I pulled the cover off and took some close ups to send to my dealership guy.
He showed them to a service guy and I'm picking up a loaner tomorrow while they fix my cam sensors.
I really appreciate the information, Thanks to all who contribute.
I'm also getting that cold air intake hose nailed down where it belongs.