Mercedes-Benz AMG 45 | A Class | CLA Class | GLA Class | RENNtech Power Module ECU | M139 | Up To 490 HP and 398 LB-FT (S-model) | 2.0 L TurboECU+ Upgrade Up to 456 HP 384 LB FT Gains: +68 HP & +30 LB FT A 45 GLA 45 CLA 45 The RENNtech Power Module (RPM) ECU tune delivers significant horsepower and torque gains across the entire power band. By modifying boost mapping and keeping optimized air to fuel ratios, the entire power and torque curve is shifted upward delivering +69 HP +30 LB FT in the Mercedes AMG 45 M139 engine, based on Dyno measured power figures. The RENNtech Power Module is