It seems my 560 is running fully mechanical as my multimeter shows no power at any of the electronic inputs... the flapper potentiometer, cold start injector, EHA, etc and idling high. I can only change idle via CO screw.

These CIS ECUs seem to be pretty durable, has anyone experienced a dead one before? Any definitive test I can run to see?

Thanks

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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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