What exactly does it do?

I'm rewiring an S280 that was converted to diesel. Right now the car can be started by jumping the cables at the starter...

I have located the lock out relay and have confirmed 12V in key start position in one of the pins... but the relay isn't clicking. I opened up the relay and confirmed that it works. The positive pin that I identified does not correspond to the pin at the relay which triggers it.

I'm guessing it's because of the NSS? Where is that circuit exactly? Perhaps I can jumper it.

Anyway... first things first... "What is the function of the Starter lock-Out relay?"

If I can't use the original wiring... I can just jumper the Lock-Out relay to start via the ignition.... for now.

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85 190E 2.3(SOLD)
86 230E (-->300D) sold
87 300D (-->300TD) sold
68 250S w/ a 615 and manual tranny (RIP)
87 300TD (SOLD)
95 S280 "The KRAKEN" (Turbo 2.9 602 transplant) traded
86 190E 2.3... current project