good spark,good fuel pressure, no inj.pulse will start and run good till you turn it off then it wont start untill you crank 4 or 5 times
Hi, Johnny, welcome to the forum. Please take a minute to click the User CP link and complete your BW profile re: vehicle and location as that is often useful information.
Also, you posted into the general forum which as the name suggests pertains to general issues across models. However, there is a forum specifically for your car, the W210, scroll on down the main forum page and you'll see it in the sedans section. There you'll find a wealth of information about your car and some good folks that know way too much for their own good.
In this case your description is pretty cryptic and you don't give miles, etc., but from what little you've said, my first/best guess would be the Crank Position Sensor. Fairly common problem, pretty easy to change, not terribly expensive.
Take care and enjoy the ride,