I'm not sure what is 'legal' in regards to EGR. My '84 euro 300TD has no EGR, but was imported successfully...now registered in California...by the way, if the EGR is disabled, it appears the vacuum switches on top of the valve cover would then have no function. I believe they remove EGR vacuum at idle and full throttle. These switches contribute to the various vacuum problems associated with the cars, as they age.

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