Hi just re joined as could not reset password.. 09 cls 350 cdi. Occasionally when I turn the key to the start position it does not crank over or make any noise or click, but here is the strange thing... If I return the key to IGN ON and try again it still will NOT turn over, I can try countless times, but if I bring the key right back to off and try it will start as normal. This makes me think its not the starter motor or solenoid. Any thoughts?