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You need a lotta stuff. Crank position sensor is just one feed. There's an air mass sensor, a thermoswitch (low temp), an air temp sensor, and a barometric sensor. There's a diagnostic plug. A reference resistor. It interfaces with the EGR system. Power comes from an OVP relay. Harness. In order to use the air mass sensor, you need the turbo airbox which breathes through a port on the side of the fender. And finally, there's a solenoid on the back of the IP that adjusts the rack and a sensor which reports rack position. Suggest you start with the FSM and ask as you go. Here's a block diagram of the 190DT version, which is a bit simpler than the 300D:
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