Read the buyer's guide here first.
http://www.mbcoupes.com/w126index.htm

If the car is a Euro 380 SEC then it will have a dual row timing chain in it. Only NA cars didn't until 1984 MY.

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1986 Euro 500SEC "RUF" 9:1CR, "Rose"
1985 Euro 500SEC Cabriolet AMG Widebody
1982 Euro 500SEL "Blue"
2001 Texas Heeler (Aussie/Queensland X) "Sulphie",
2012 Queensland Red Heeler "Squeak"
Best dogs I've ever had.