AllPartsExpress shows both of them - http://www.allpartsexpress.com/ShopByVehicle.epc?q=&yearid=1993%40%401993&makeid=MERCEDES+BENZ%40%40MERCEDES+BENZ%40%40X&engineid=1194656%40%40400E++%2F+V8%2D4196cc+4%2E2L+GAS+FI%40%40400E&keyword=sensor&subcatid=Crank+Position+Sensor@@Crank+Position+Sensor%2FIgnition+System&mode=PA but those symptoms could be a lot of things, better to read the fault codes first. Bad Crand Position Sensor is code 17 on pin 17.