One problem related to fuel pump has been reported for the 2003 Mercedes Benz M Class. The most recently reported issues are listed below.
While driving in moderate traffic engine stopped. Driver (not me) was very scared and said an accident almost occurred as she maneuvered to breakdown lane without power and no power steering. Second occurrence of sudden engine stoppage while driving with loss of engine power and power steering in this vehicle. Fuel pump had been previously replaced.