I was under the impression that pressing the "M" button made no difference to your acceleration, but rather, simply accentuated the throttle response??

I think that if you floor the car in "M" mode, it will feel faster, but actual acceleration times will be the same, no???

That's how it works in the M3, anyway...

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2009 Lamborghini Gallardo LP560-4
(2006 Z4 M Roadster - Mary's )
(2012 X6///M )