McLaren Super Series Owner's Handbook Manual page 100

Driving Controls
Handling and Powertrain Controls
7. Launch control will operate if the procedure
has been followed correctly until aborted.
NOTE: Whilst in launch control, the
vehicle will carry out automatic gear
shifts, and optimise traction. It will
continue to do so until launch control is
aborted. To abort launch control,
release the accelerator pedal, apply the
brake, or operate one of the gearshift
paddles.
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