The crank flange from the EGX manual trans is 5mm thicker than the EGZ auto trans and required a spacer. and yes the bolt patterns are different. But the important question is, what were the manufacturing changes between '05 & '06 to both the Flywheel and the Crankshaft ? did they change to a common bolt pattern ? I am assuming the current bolt pattern differences reflect manual transmission vs auto transmission attachment points. This prevents an easy bolt-up of the 6spd to the SRT6 engine without a special flywheel from a different model MB vehicle.