Diesel engine shut off. 1995 E300D

Does the 1995 E300D still use a mechanical pnuematic valve on the ignition switch to kill the engine via vacuum? Or does the car use an electronic vacuum switch-over valve to kill the engine? Or does this
car use an electric actuator on the injector pump to kill the engine?
I didn't see any manual emergency stop lever under the hood like the 123's and 126's have.
Thanks for your input,
Craig
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It is an electric one mounted on the injection distrubitor. The shutoff is above the fuel filter... that black knob and if you keep turning it, it will starve the engine of fuel and shuts off.
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