ah, well that explains a lot. Thanks Steve for your input on this, I was following your instructions after all.

Does this mean the only way to verify the mixture would be by checking the exhaust emissions?

The other question that springs to mind is: if there's an electronic adjustment system in place, which I presume is what the EHA is there for, then where does it get feedback from?

I have observed that the car doesn't want to start with the EHA disconnected, which I believe is not the case with later models, so it looks like it is doing something.

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1987 300e manual 250,000 km (sold)