2001 Mercedes SLK 320 will not crank?

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All of a sudden the engine would not start. 1. Turns over maybe 1 second then stops. 2. I retry to start, same thing turns over maybe 1 second and stops. 3. On the 3rd restart this time does not turn over at all. 4. Disconnect the battery & retry all 3 steps and the same results. The battery is good. Did not give a sign of any issues till last night. Has 130K miles. Help!!!! Thank You!!! Glen (Glenalmany@yahoo.com)