$1,699.00 House of Power Stage 1 Mercedes C400/C43/C450 ECU Tuning 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 C400/C43/C450 2016+ Stage 1 Performance ECU Tune (M276) quantity — OR — Add to cart Category: C400/C43/C450 Tags: benz, c400, c43, c450, Dyno, ecu tune, m276, mercedes, stage 1, stage 2, tune Description Description +85 Horsepower +115 Torque Performance ECU Tune for the Mercedes C400/C43/C450 M276 Engine (2016+) Eliminate Top Speed Limiter Increased Throttle Response Optimized Fuel and Spark Optimized for 93 Octane Related products BMW 535d (2007-2008) Stage 1 Performance ECU Tune (N57) $1,099.00 Select Options BMW 335d (2007-2008) Stage 1 Performance ECU Tune (N57) $1,099.00 Select Options BMW 550i (2006-2010) Stage 1 Performance ECU Tune $1,099.00 Select Options BMW 435i (2012+) Stage 1 Performance ECU Tune (N55) $999.00 Select Options