$1,699.00 House of Power Stage 1 Mercedes E550 2012-Present ECU Tuning (M278) Want to add even more Horsepower? Upgrade to Stage 2 ECU Tune. (Catless Application) Adds an approx. 30-40 additional Horsepower! Check the box below: Upgrade to Stage 2 + $399.00 Product price Additional options total: Order total: Mercedes E550 2012+ Stage 1 Performance ECU Tune (M278) quantity — OR — Add to cart Category: Mercedes E-Class Tags: benz, Dyno, ecu tune, m278, mercedes, s550, stage 1, stage 2, tune Description Description +180 Horsepower +200 Torque Performance ECU Tune for the Mercedes E550 4.7L M278 Engine (2012-present) Eliminate Top Speed Limiter Increased Throttle Response Optimized Fuel and Spark Optimized for 93 Octane Related products BMW 545i (2003-2005) Stage 1 Performance ECU Tune (E60) $599.00 Select Options Nissan 370z EcuTek Tune $1,000.00 Select Options BMW 128i Stage 1 Performance ECU Tune $600.00 Select Options BMW 428i Stage 1 Performance ECU Tune (N20) $999.00 Select Options