What is this?
I recently started hearing a soft squeaking noise from behind the dash (center/Rt) of my '86 300E, w/90xxx miles. Sounds like something heavy is loose in there, makes the sound mostly when going slower over pavement ripples, or when decelerating. an oscillating sound, like "squeak-squeak-sqeak", usually lasts less than a second at a time, but is still annoying considering how quiet the car is otherwise.