Hofler,
The EGR valve is below and infront of the air filter. There are some vacuum diagrams found on phantoms page. As I check out other post it seems a lot of people are disconecting the EGR all together. Brian Carlton seems to have a system to do this but must be sure of what modle you have. Brian if you read this what I have is the 84 300D Turbo diesel. Am I correct in that the ERG will only rob power on this model and can be bypassed alltogether by pulling the white line from the y going into the second y that goes to the tran and other to the green surge damper, then pluging it. Then taking the black line, from the 3/2 valves going to the y which vents to the passenger carpartment, remove it and plug the y. When the 3/2 opens and closes would there not be a slight reduction in the vacume going to the tran due the the additional venting?
Was able to get the motor to stop on it's own when I turn the key off by plugging the yellow line and the yellow/black line which go into the firewall. The Yellow line would not hold any vacuum at all.
Hofler you might want to read the thread by tankdriver "New member- (with transmission problem) and then another by Samuel M. Ross "It's CRITICAL... how you set your transmission's vacuum system on your diesel MBZ...

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G. Garvis, "The bell Man" new to MB 84 300D Turbo Diesel, looking to using WVO once running well.