What is the "thrust cutoff switch"?

The two throttle linkage switches I am familiar with are the "microswitch" on the linkage, and the "throttle valve switch" at the end of the throttle shaft.

It's been awhile since I looked at the schematics, but as I recall, the microswitch is the trigger for deceleration fuel cut-off, and the TVS is the trigger for idle speed control. (I incorrectly referred to this as "throttle position switch", or TPS in a previous post) In this context the microswitch could be referred to as "deceleration fuel cutoff switch", but the MB literature just refers to it as "microswitch", which is the generic name for this type of device.

Note that when you push on the throttle pedal and the linkage is properly adjusted the linkage flips the microswtich before it moves the throttle shaft lever, which flips the TVS idle circuit. Likewise, on closing, the TVS idle circuit will not flip until after the microswitch flips.

The TVS also has a wide open throttle circuit to signal the ECU to go into open loop enrichment at WOT.

Duke