My 500E runs a 100% better. Starts quick, no hestitation umder throttle, and no ASR when cold. I'm in love again. Although the ASR went on once when I let off the gas coming to a stoplight, aaargh. It may be due to turning up the idle previously and i'll readjust tonight.

I only took off the top portion or cylinder of the TBA and cleaned the butterfly valve and surrounding area with carb/throttle body cleaner. There was grime on the bottom of the TBA, but I don't understand how that could effect performance.

I probable saved two hours of work by not removing the entire unit. Plus a gasket covered 2 of the 4 allen bolts, which would have been a pain to cut away.

It was a great night in the privacy of my garage with the ball game on. No $1000 TBA, no $500 Wiring Harness and no $200 idle control vavle. Only time and effort and no $$$. The car runs great! For now.