My 2007 Kountry Star has a very annoying rattle in the door. After much listening and poking around I believe it is caused by the air operated piston that lives in the door jamb and is supposed to pull the door securely closed when the air brake lock is released. I have adjusted and played with this mechanism with no success.

Has anyone else experienced this phenomenum? If so, how did you fix it? I have adjusted mine untill the plastic cam mechanism is cracked and still the rattle persists.
Have a nice day - Darrel