Yes, you have to mash on the brakes to keep the car from moving forward for launch control. It's just fancy brake torquing.

I also wonder how much wear it's putting on the torque converter, but then again popping a clutch at high revs in a manual is also hard on the components.

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2022 X5M Comp Dravit Grey/Full Silverstone
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2018 M5 Black/Full Silverstone
2015 X5M Donington Grey/Full Silverstone
2010 X5M Space Grey/Full Silverstone
2003 4.6is Silver/Black