85 380SE W126 Rhythmic Vibration Felt in Gas Pedal

[gmercoleza]

Car has approx. 125K and runs PERFECTLY. New motor mounts, subframe mounts, trans mount, and engine shocks. However, I can feel the vibration of the engine when I take up the slack in the gas pedal, just before engaging the throttle off-idle. Sort of like when resting the pedal on the cable, it seems like it is picking up engine vibrations that aren't there. I never noticed this before. Kind of throws you off, feeling this weird vibration in your foot for a split second as you accelerate away from a light. Like I said, everything works perfectly and the idle is smooth as glass, so I'm confused. It's not related to the A/C, because it occurs with A/C on or off.

I won't worry too much until something breaks. Has anyone else out there experienced this?