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On Efficient engine dynamics, on a stock tune, the F10 M5 feels every bit its weight - heavy weight and nonlinear throttle response. You're supposed to stay on Efficient for about 5 miles and when the engine is warm up to operating temps.
On Sport and Sport Plus, the car seems to shed a couple thousand pounds and is totally worth it. Feels like a different car entirely.
I do want to waken it up on Efficient mode. The BMS Pedal Tuner looks like a really good alternative to the cost of a custom tune or some cheaper (but possibly less safe) OTS tuning options.
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