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

Thanks for your input,

Craig