Definitely sounds like you have a fuel pressure leak. I had a similar problem. Replaced the fuel pressure regulator, problem gone.

Did you try this - before cranking the engine over in the morning, insert the key in the ignition and turn it all the way to the right but don't engage the starter (position 2 I think) i.e. enough to power things up without actually cranking the engine. This should provide power to your fuel pump (you can hear it under the car) and allow the system to pressurize. Leave the key in this position for a few seconds (10 or so) and then crank the engine over. If it starts right away then you probably have a fuel pressure leak.

__________________
Chris
2007 E550 4Matic - 61,000 Km - Iridium Silver, black leather, Sport package, Premium 2 package
2007 GL450 4Matic - 62,000 Km - Obsidian Black Metallic, black leather, all options
1998 E430 - sold
1989 300E - 333,000 Km - sold
1977 280E - sold
1971 250 - retired

"And a frign hat. They gave me a hat at the annual benefits meeting. I said. how does this benefit me. I dont have anything from the company.. So they gave me a hat." - TheDon