The 'a' below the electronic handbrake stands for 'autohold', which refers to the automatic parking function. This feature allows the driver to avoid unnecessary vehicle slippage without needing to brake for extended periods when the electronic parking brake is engaged. The automatic parking function can automatically activate four-wheel braking when the vehicle is stopped at a traffic light or on a slope, eliminating the need to keep the foot on the brake pedal or pull the handbrake during prolonged stops. The working principle of the automatic parking system: The brake management system controls the four-wheel braking through the extended function of the electronic handbrake. When the vehicle is temporarily stopped and needs to restart within a short period, the parking is handled by the ESP-controlled brakes. The computer uses a series of sensors to measure the vehicle's level and wheel torque, determines any tendency for the vehicle to move, and applies an appropriate braking force to keep the vehicle stationary. If the temporary stop exceeds a certain duration, the brake system switches to mechanical rear-wheel parking, replacing the previous four-wheel hydraulic braking. When the vehicle is about to move forward, the electronic system detects the throttle pressure and, for manual transmission models, the clutch pedal travel to determine whether to release the brakes.
