Activating DTC
Press button.
TRACTION is displayed in the instrument cluster and the indicator lamp for DSC OFF lights up.
Deactivating DTC
Press button again.
TRACTION and the DSC OFF indicator lamp go out.
BMW X3 Service & Repair Manual > Transmission in general: Installing exchange transmission (GA8HP45Z) (N20)
IMPORTANT:
Do not let skin come in contact with transmission oil and do not inhale fuel vapors.
Wear protective gloves.
Ensure adequate ventilation.
Drain automatic transmission fluid at oil drain plug.
IMPORTANT:
After completion of work, program control transmission ...