The EDS should notice that the flapper is unplugged and cut the boost. It'll know by the increased airflow through the airflow meter on the filter box. You can temporarily do it for testing purposes though; it won't hurt anything and the boost should come back when the engine is restarted.

__________________
Dale

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1990 300D 2.5 Turbo -155k
2000 E430 - 103k
2014 Jeep Grand Cherokee Ecodiesel 4x4 - 11k
2014 VW Passat TDI SE - 7k Bro's Diesel
2006 E320 CDI - 128k Pop's Benz

Pre-glow - A moment of silence in honor of Rudolph Diesel