You will note that I said "difficult."

However, I was thinking. You could find the right diameter bolt - 6 mm? in the right length, and file most of the threads off, leaving 5-6 mm of threads near the head. Then you could tap the hole, insert your new pin and tighten it with a wrench (and Loctite).

You might even be able to find a specialty bolt like this.

__________________
Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe