Optimized ECU firmware for the 2015 Audi Q3 2.0 TDI CR (DFTA engine, 136 hp) using Bosch EDC17C64. This tuning file includes a Stage 1 map calibrated on software version 1657 (ID: 004415), targeting smoother torque delivery and improved part-throttle response for daily driving. Fully tested with CMD Flash hardware and verified for stability on manual gearbox variants.