Mercedes-Benz 350 P0703 Possible Solution : The crankshaft sensor signals the fuel injection computer or the ignition control when the cylinders are firing. This causes the ignition coil to provide a spark and the injector to inject fuel into each cylinder at the right time.If either sensor isn't working correctly, the car will run rough and ... Makita bl1830b 2 18v lxt lithium ion 3.0ah battery