This Stage 1 ECU tuning file targets the 2006 Audi A4 1.9 TDI PD with Bosch EDC16 control unit. Designed for the 5-speed manual transmission variant, this remap enhances low-end torque and mid-range responsiveness without compromising engine safety. Fine-tuned injection and torque limiter strategies improve everyday driving performance, making the car feel more dynamic while retaining OEM drivability.