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FWIW;
I don't know if it would apply to the newer MB's, but on a VW TDI, the ECU can be fooled by adjusting the signal
coming from the MAF sensor by inserting a diode in the line, to cause a small (.3-.7v) voltage drop.
The diodes are shorted out of the circuit by a vac. switch which is activated by the vac. going to the now disconnected EGR valve. The diodes are only shorted when the vac is applied, to simulate the valve opening.
The point at which the vac switch turns on is adjustable, and helps to keep the ECU happy.
Of course this is only recommended for 'off road' use only, as it is not legal to bypass emissions equipment.. YMMV
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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!
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