Well, I almost did it myself, but I didn't. The diag was correct. Bad regulator. Fastlane had one for 250.00 but I wasn't sure so I took it to my Indi, and $350.00 later the regulator replacement is doing the job. I also pulled most of the cowling off when I started trying to fix it myself, and the charcoal filter was a mess, so I had them replace it as well. Again, I should have done that myself and saved a hundred, but its all done and working now. These posts actually do work so follow their advice.
96 S500 79K (great white whale)
98 E430 80K Sports Package (gray ghost)