Yeah, when my 124 mounts went bad the engine just kind of sunk down and the thing vibrated a lot. I'm just kind of grabbing at possible solutions.
And I'm with you on that binding throttle linkage thing! The more you rev it the more it revs itself! Not long after my model they started using throttle cables instead of solid rods and I can't help thinking that might have been part of the reason.

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1983 M-B 240D-Gone too.
1976 M-B 300D-Departed.

"Good" is the worst enemy of "Great".