Sorry forgot to mention this. From time to time this "no crank" will happen. When it does I perform this simple test. I turn the to the Power position, step on the brake pedal and shift to Neutral. I then turn the ignition key to start the car. I then shift to Park.

If this works then you know that you need to have your Neutral Safety Switch replaced. Lot's if info here on how to do that.

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03 CLK430 Cabrio 211K Pweter Silver/ Oyster Leather
90 300SEL 214k Pearl Black/ Alto Grey/Black Leather

Prior: 85 190E, 88 300TE, 89 300TE, 90 300E 2.6, 90 300TE, 92 300E 2.6, 91 and 93 300SL, 87 Ferrari Mondial Cabrio