Symptons: Initially starts and runs for 2 seconds and then dies. Try again and will not start. The next morning, it will repeat itself. No matter how much you crank it and use ether, it will not budge, kick or smoke. Before I ruin the starter, it would be appreciated if some knowledgeable person could tell me if it's electrical cutoff switch or sensor that's defective or something else. The glow plugs have been tested and the diesel is fresh. I have read that it could be the over voltage protection relay. Is this accurate, and if so, how can I by-pass the relay to start the car? What puzzles me is the older fuel injection diesels, like the 300D, is straight forward, whereas this model of engine, 602, has many electronic devices. I am aware of the over voltage protection relay, but want to know all of the conditions that would not allow the engine to start. Recently, I purchased, the chassis and body manual, but there is no pertinent information. The engine manual is very expensive. Typically, most manuals will include a diagnostic section, but I fine the Mercedes manuals to be lacking in this regard. If anyone has the manual for the 602, could you please research my question and send me an email. Very much appreciate any and all help. Thanks from George in Canada.<br> <br> PS. If anyone wants a chassis and body manual to buy or trade for the engine manual, please contact me.