Thanks kingDEL for the link!! Been having some of the same issues with my 96 c280. Sometimes first try vroom all good, others i'll just about kill the battery and still no start. The 5min thru 1 hr thing does not work here. Now come back the next day and the first turn of the key and it starts right up. I have changed fuel pump and fuel filter. Now will check into fp regulator and my position sensors. This issue has had me stumped for a bit. Thanks again.