where is the crankshaft sesnsor located for 2000 mercedes s500 sedan? on 2000 Mercedes-Benz S500

replaced all electrical relays under backseat and car is NOT getting fuel. How and where do u test the sensor to the fuel pump?

Your crankshaft sensor is on the front of the engine next to the crankshaft. That's where it gets it's information from as to when to send fire and when not to.with out that, your car will not get any fire to the plugs.