What a pain.  Once you get it off, you must unscrew the plastic piece of the
armrest in front.  Take out staples holding upholstry on.  Remove upholstry
while not ripping the material at the seams.  The next fun part is to split
the foam on the top or bottom.  I can't remember exactly.  Remove foam or
split open area  exposing a captured nut that has most likely fallen
out(result in slump).  You'll have to figure out how to resecure this nut as
is likely there is some plastic doodad or spring securing it in place.  Once
finished, reattach foam by wrapping in duct tape around the whole job.
recover with material staple back on and voila. its good as new 2 frustrating
hours later.

Yours

Andrew Dunn
89 GL