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
Mercedes-Benz W124 Kick Down Switch Replacement | 1986-1995 E-Class | Pelican Parts DIY Maintenance Article
Genuine Mercedes Benz - 0045451714 - Kick-Down Switch