Is the connector keyed to hook up a certain way on the ICV?

When I purchased my SDL it would idle around 500RPM, not correct due to the ELR system to control idle. The plug for that on the back of the IP was reversed... I flipped it around and it went right back to spec, which is around 680RPM as I recall.

How about the throttle switch on the side of the throttle body?

Did a PO fart with the linkage to control the idle speed due to the vacuum leaks?

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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

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