This diesel engine is a 2007 Mercedes MBE 900 and it was shutting down on the road unexpectedly. The operator would be driving under several different conditions when it happened. we found the harness where the fault wire was located. Of course the engine did not die for us but you can hear it cutting out when the harness is moved up and down. Manipulating the harness in this manner is troubleshooting 101 when there is a suspect wiring problem in the harness. We have had luck using this method several times.