E-Class (W210) 1995-2002: E 200, E 220D, E 240, E 290TD, E 300TD, E 200, E 240, E 280, E 320, E 420, E 430 (Wagon, Touring, 4Matic)

Help on Idling

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Old Jun 15, 2005 | 07:18 AM
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Help on Idling

Hi,
I have a 1996 E230 W210. It has that 4 cylinder 2.3 liter engine that I think came from a late C230.
My problem is that when the A/C is turned off, the idling of the engine is at a high 1500 rpm. But if the A/C is turned on, the idling is in the correct 700-800 rpm range. This is when the car is either cold or at normal temp of about 90-95.
Is there some sort of sensor or whatever that controls the idling?

Help!!!

Thanks a lot.
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