The ISC/CC/IA that Arthur refers to are the functions controlled by the throttle actuator.
Just thought I'd put that in.... (free. no charge to the reader).
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Paul S.
2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.
1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".
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