Help!! 1976 MB 450SL I went to drive my MB to work and the throttle stuck WIDE OPEN. Thrilling ride while trying to get to a safe stop and was able to turn off the ignition. I checked all the linkages and although stiff seem to activate ok (not smooth, just ok). Consulted 'Haynes' manual and checked for return spring and WD-40'd the linkages. Removed carpet - throttle still sticks. Does anyone know other causes for this? I can lift the accelerator pedal with my foot to "unstick" it but it's not much fun starting the car while not knowing if it's going to start okay, or go to 6000 RPM or so before I get it under control again. Any ideas??