Just n time,

I have read a few of your posts here. Allow me the liberty to inject some wisdom into your life...... Wisdom gained from 20+ years of working on my very own MB.

First, I saw where you did not take to heart some advice given to you by MB Doc, a certified master technician. NEVER disagree with the advice given by an individual who has been trained by MB and makes his living working on these autos. He has forgotten more than we will ever know! Remember, he is making an educated diagnosis by means of an online discussion, very hard to do without having the vehicle in front of him.

Second, do you have the manuals or service CD for your vehicle? You aren't working on a Ford or Chevy and a Mercedes requires knowing some basics, often found in the manual. BUY THE MANUALS! Read them, and follow what it tells you, it is your friend.

Finally, have the wisdom to know when to say "I don't know". Very seldom will you b able to "throw parts" at a problem and get it fixed. Reading these forums/posts will get you into trouble if you don't know your basics. Your previous runnability problems are pretty basic when considering how old your car is and what your symptoms are. You have to know how to diagnose before you can repair. Hooking up a fuel pressure gauge is a good start, knowing WHERE to hook it up is priceless.
Good luck.