This is a great thread. I've been considering doing this mod to my car. However, I spoke with Oliver at Speedtuning today and he said that they now offer an "EGR Kill" ECU tune for $50. I'll be going with this instead of messing with all the wires and such.

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Ed
-1984 Mercedes 190D 2.2 5-speed gray market(bought@30,000 miles) (Sold back to original owner@170,000 miles)
-1999 Mercedes E300DT (245,000 miles)
-1999 Mercedes S500 Grand Edition (80,000 miles)