thanks Diese911
I wasn't aware of one time use washers possibly bolts too.
I will pass along the info and if the engine gets fixed I will let you know, but I doubt I'll hear any more about it. Just happy I am not the vehicle owner!
my OM603 with #14 head just keeps on ticking!

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'95 E320 Wagon my favorite road car. '99 E300D wolf in sheeps body, '87 300D Sportline suspension, '79 300TD w/ 617.952 engine at 367,750 and counting!