How to Perform a Launch Control Start in a BMW M4 Automatic Transmission?
2 Answers
BMW M4 Automatic Transmission Launch Control Method is as follows: 1. Launch control consumes significantly more engine and transmission resources compared to normal driving, so many manufacturers impose limits on the number of launch control starts. Exceeding the specified number of launches that result in engine or transmission damage may void the warranty. Therefore, it's essential to warm up the car before attempting launch control. 2. Turn off the ESP, which in the BMW M4 means disabling the DSC. This allows the engine to output power freely. 3. Switch the transmission to manual mode to lock the gearbox in first gear. Utilizing the largest gear ratio of first gear maximizes the torque output from the engine, providing the strongest launch control torque. 4. Press the brake pedal all the way down. 5. Press the accelerator pedal all the way down. This KICK-DOWN action is like unlocking the vehicle's full potential. Keeping the accelerator fully depressed activates this mode, signaling to the vehicle that maximum power performance is required, thus enabling the launch control function. 6. Use the cruise control to adjust the RPM—up to increase and down to decrease—to control the maximum engine speed when the accelerator is fully pressed. The maximum torque RPM for gasoline engines is not at the highest RPM; it varies depending on the specific model. For this BMW M4, the maximum torque RPM is between 3000-3500, so set the cruise control to a maximum of 3500 RPM. 7. Release the brake immediately once the engine reaches the set maximum RPM, and the vehicle will 'zoom' forward.
I've been driving a BMW M4 automatic for two years, and the first time I tried launch control was quite nerve-wracking, but the effect was indeed fierce. You need to first switch the driving mode to Sport Plus or Competition Mode, then partially disable traction control, which allows the system to lift restrictions. Next, firmly press and hold the brake pedal, floor the accelerator and maintain it, listening to the engine sound; the RPM will surge to around 5,000, wait for it to stabilize for a second or two, then release the brake, and the car will shoot off like an arrow. Note, this maneuver is very harsh on the transmission and clutch plates, so don't do it frequently, especially when the car is cold. It's recommended to practice several times in an open area to get familiar with the feel and avoid wheel spin or loss of control at launch. For daily driving, periodically check the oil temperature and tire wear.
