Genuine Mercedes Benz - 0045451714 - Kick-Down Switch
SWITCH, Carburetor Air Control Valve / Transmission Throttle Control Switch (Down Shift / Kick Down), mounts to a bracket on the gas pedal, repro - #C-3415-140B - National Parts Depot
Troubleshooting the Kickdown switch - PY Online Forums - Bringing the Pontiac Hobby Together