I decided "no time like the present" and got to working on my 1983 300D after about a year-and-a-half of sitting in my back yard since I bought the car. Stripped the interior to clean it and, lo and behold, a circa-'80's necklace vial full of Columbian marching powder.
What's the strangest thing you've found in a new car?

My wife has been pestering me to get one of those round tuits for a long time.

Where did you get yours?

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Michael LaFleur

'05 E320 CDI - 86,000 miles
'86 300SDL - 360,000 miles
'85 300SD - 150,000 miles (sold)
'89 190D - 120,000 miles (sold)
'85 300SD - 317,000 miles (sold)
'98 ML320 - 270,000 miles (sold)
'75 300D - 170,000 miles (sold)
'83 Harley Davidson FLTC (Broken again) :-(
'61 Plymouth Valiant - 60k mikes
2004 Papillon (Oliver)
2005 Tzitzu (Griffon)
2009 Welsh Corgi (Buba)

How much do you estimate this increased the value of the car? Perhaps you could hawk it for some valve adjustment wrenchs or something.

Legal Disclaimer: I am advocating nothing in this post.

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'95 E300D ("Tank") - 231,000 miles
'79 240D ("Biscuit") - 197,250 miles (Sold)
'83 240D ("Ding-Ding") - 217,000 miles (Death by deer)
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"Back off, man. I’m a scientist” ~ Peter Venkman

Never found anything like that in my cars. Just dirty Q-tips and coins.

So what happened to this fine necklace

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So I take it you worked on the car without sleeping for two days straight after that?

Never touch the stuff. Actually, I never even toked up despite the fact all my friends were doing it at the time. Never liked losing control.
I proceeded to empty said vial and chunk it. I can't imagine getting pulled over and having that item pop up during a search.
A buddy of mine bought a hoopty from a local "G" (it was a classic Malibu) and found a .38 revolver taped under the back seat. It found its way into the local landfill.
Anybody find anything weirder?

Probably why you found it where you did.

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'95 E300D ("Tank") - 231,000 miles
'79 240D ("Biscuit") - 197,250 miles (Sold)
'83 240D ("Ding-Ding") - 217,000 miles (Death by deer)
______________________________________

"Back off, man. I’m a scientist” ~ Peter Venkman

Buddy of mine once left the top down on his MG convertible on a rainy day and before long a cannibis plant popped up from a crack in the seat.

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John Schroader
bio burnin' 83 300D, '83 300 SD, '79 240D
"I've never met a man who was good at making excuses who was good at anything else" Ben Franklin
"You cannot permanently help a man by doing for him what he could and should do for himself" Abraham Lincoln