I have a rattle in my passenger door that I can't track down.
Sometimes on the highway, and more often on rough roads,
there is a rattle/vibration.  It certainly seems to come from
the door latch area.  If I press hard on the door at the
back or corner, it stops.

I removed the interior panel and inspected and decided it
was the wire rod 'twixt the interior handle/lever and the
door latching mechanism at the rear of the door.  A fat roll
of foam seemed like the thing.

Back on the road and the rattle is still there.  I have the
door opened up now and am stumped.  Maybe something in the
actual mechanism that latches the door?  Of course, I can't
make anything sound like the rattle by banging on the door.

It does not appear to be anything to do with the glass or
window crank mechanism.

Has anyone dealt with this or a similar problem?

Richard