Re: Passenger seat rattle
Yep: I have the same rattle (from the passenger seat head rest).
I noticed that it is not there when the seat is unoccupied, meaning that if the seat is "loaded" the mechanical parts that would rattle would be moved far enough from eachother so they don't touch. Or, the seat back cannot move with a passenger sitting there... The rattle does drive me nuts as well.
93 Corvette, with lightly modded LT4/ZF6. Polo green, Beige interior - garage queen.
11 Overland V8/4x4 Mineral Grey/Lt. beige/730N
Dad's car; a project I recently took over: 79 Porsche 911SC, engine build ongoing...