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Message: <blockquote data-quote="astroboy" data-source="post: 400373" data-attributes="member: 4527">The adaptive value calculates quite a number of variables in the ECU which include measuring intake velocity (air filter element condition), voltage fluctuation (battery condition), O2 feedback (effectiveness of catalytic converter), combustion effectiveness (fuel grade, injector performance (fuel pump pressure, injector conditions)), functions of functions.. to come up with an optimum value compare to the default mapping value. Resetting it will force your ECU to start measuring again and arrive to the next optimum value and it takes time to get it right as the ECU will experiment with many combination to get it right, sometimes weeks.Like what Schwepps said, just flick to "S" if your want performance mapping.. :wink: :love:E90 can't turn key le.. and radio won't on without pressing the "Start" button.. to start radio without cranking the engine, need to press "Start" without pressing brake pedal.. should we do that? <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite11" alt=":rolleyes:" title="Roll Eyes    :rolleyes:" loading="lazy" data-shortname=":rolleyes:" /></blockquote>