Well, for what its worth, I can't say how this would work on the newer MB's but here is a hint..

IF a person were to take a small vac. switch, adjust the switch point to the correct point (about 40-50% of max vac), and attach to the EGR vac hose to the switch instead of EGR.
On the normally closed contacts attach 2 diodes perferably germainium ones (.3-.4.V forward bias)in parallel, back to back,
(more fool proof this way), and splice the whole thing into the line from the MAF going to the ECU. Silicon diodes would give a larger drop, and are easyer to find, but might be to large for smooth operation.

This might work, it might not, depending on your settings of the switch, and how temperamental the ECU is. I know it has worked for some people's VW TDI engines.
Use at your own risk, as you are messing with emissions and the law does not like that much, so use at your own risk.

The car will no doubt feel a little more zippy with the EGR not restricting the flow of O2 to the engine. Also the turbo will spool up quicker in responce to throttle pressure.
I don't think this would be a good thing to do on a gasoline engine, as you would be fooling with the fuel/O2 ratio. And don't gassers have an O2 sensor in the exhaust?
That would probably throw a trouble code too... if EGR was broken.


Drive ON!

__________________
1985 300D - 190K Miles - 26 MPG on first trip home - getting rust fixed and repainted.
1987 MB 300 SDL - 238K miles - Sold
2003 DC Ram 2500 QuadCab 6 speed, 4x4 Cummins - 82K miles - 20+ MPG
1999 VW A4 Jetta TDI 5 speed - 83K miles - 50+ MPG is easy!