If I remember correctly, my 500SEC only had one spring there as well.

I think it was something about the two pendulums being tied together by the linkage between them, but I'm not sure at the moment. It's been a couple of years since I was in there doing the engine swap and all the associated digging about on the internet for it.

I remember that it was a porsche site that had the good parts break down diagrams of the bosch distributors, though...

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-Josh
Testing the cheap Mercedes axiom, one bolt at a time...