This is the one I put up for the 2.7
http://www.ausjeepoffroad.com/forum/...d.php?t=115039
If the 3.0 uses the same vacuum actuator then this will work for you as well.
If not go to mercedesclub.org.uk and you will find the info there. The EGR threads are hard to miss as they have hundreds of responses to them.