Mine has that early morning creak also.
The car and I are a matched set!

Still holds alignments so I'll leave it alone until i feel like putting up with my creaks to crawl under and take a closer look.

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Charles
1983 300D, bought new, 215k+ miles, donated to Purple Hearts veterans charity but I have parts for sale: http://www.peachparts.com/shopforum/showthread.php?t=296386