KarlS,
Roy was correct in his response, silver relay in the fuse box with red fuse on top. You can't miss seeing the fuse once you remove the fuse box cover. It's the only blade type fuse in the box. However if that doesn't fix it I have my old idle control unit that you could try. It works fine, I bought a new one and now I've traded the car for a 300SD. If you want to try that let me know and we'll work something out.

__________________
U. S. Air Force Air Traffic Controller
"U gotta keep 'em separated!!"