i test drove a 4.8 prior to purchase and did notice a bit of lag on a demo vehicle with just over 10k miles on it...
my 3.0si has the very same lag (a fraction of a second) but only when i stomp the gas hard... in smoother acceleration (progressively pressing the gas as i'm accelerating) i'm actually quicker and there's no lag... it's pretty fast...
on DS mode...no lag whatsoever... pulls hard and with no hesitation..
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2012 X5 50i M-Sport
2014 X3 35i M-Sport
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