As a new owner of a 98 E300D I find that the throttle return spring is very light. It makes the pedal very sensitive. In looking at the coil spring apparatus that retracts the pedal, I believe that there should be a secondary spring on the device.

If this is true how is it connected and does anyone have a picture of same?

I always thought that it was required to have a secondary return device on throttle actuators.