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Old 09-09-2011, 01:30 PM
Andras Andras is offline
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Join Date: Nov 2007
Location: Little Neck, NY
Posts: 110
Quote:
Originally Posted by JimF View Post
There's an idle compensator which kicks in when A/C is on. Suppose to compensate for the compressor "drag" on the engine. Sounds like that's not working?? Don't know where it is.
The only place I imagine it can be, is part of the ETA function, meaning the the ECU instructing the ETA to open the throttle more. The same should be true for the engine running cold, shifting from park to drive, and for cruise control. I believe the ECU should control the butterfly valve in all those conditions.
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2004 E500 4Matic 138,000 miles
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