You might want to consider joining a club devoted specifically to your make of car. You will tap into a source for parts and technical information, as well as a network of fellow car owners who may be able to answer your questions. Possibly someone with a car just like yours, lives not far away, and would be happy to let you inspect their car and take photos of the interior.
Here's one Mercury club I found on the internet
http://www.fmrcoa.org/index.htm . Here's another:
http://www.mercuryclub.com/index.php . Possibly this second one is just a "web club", but you might try posting your question on its forum anyway.