Maybe this will help?

http://www.peachparts.com/shopforum/diesel-discussion/386521-fixed-1982-300sd-odometer-slip-high-speed.html

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79 300TD “Old Smokey” AKA “The Mistake” (SOLD)
82 240D stick shift 335k miles (SOLD)
82 300SD 300k miles
85 300D Turbodiesel 170k miles
97 C280 147k miles