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BMW 318i - kal
Hi can any one please help. I have a 318i BMW (new shape) - auto. The car runs slightly rough without the a/c on, and a slight vibration is felt through the steering wheel - the engine never cuts out, BMW diagnostics say its OK. Turning on the a/c reduces the vibration considerably. is this simply a case of idle speed adjustment? In P or N the idle is fine.