Hi my hymer 510 starline 2001 while driving the other day just stopped on the road. the engine just stopped for no reason and had to be towed to a garage. The engine just cut out. The engine was turning over no problem with the battery. It doesnt seem to be anything mechanical more than likely electrical. Any ideas what could cause this, it has a five cyl diesel merc engine with about 150k on it. Anyone experience this with a merc engine.