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I’m not a 100% sure, but I just keep the default setting (button on - green LED) and I have M1 button engine set to Sport and it seems to work fine.
Per the manual: During the engine warm-up phase, the V8 high-performance engine has a somewhat rougher running behavior because of the emission controls. When the engine is cold, the exhaust gas system has a slightly metallic undertone due to the nature of the system.
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