I'm back (the bloke with the small nuts). I was going to post a reply when I completed the job, but it has been frustrating getting parts (at a reasonable price) and so the job is still a work in progress.

I did send back the passenger side Lemforder control arm with the stripped bolts and ordered a new genuine Mercedes control arm. I have attached a picture comparing the torsion bar bolt heads of the two brands. The new Mercedes bolt head has markings and serrations around the diameter of the head. The Lemforder has nothing. The genuine Mercedes bolt head looks more legit to me. How about to you?

I wanted to purchase new pinch bolts and torsion bar nuts since they didn't come with the new genuine Mercedes control arm. And then I decided that at the same time I would order a genuine Mercedes control arm for the driver's side to replace the Lemforder since I don't trust it even though I didn't strip the bolts. And that's when I ran into another delay. The parts company said that part was obsolete and unavailable from Mercedes - none in Germany! I will resume my quest on Monday, calling other on-line part suppliers.

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1995 E300D