M274 ECU Tune

All 2020 models require bench flashing at this time. ECU Tuning Process: How do I get my ECU tuned? [ POWER FIGURES REFLECT ECU TUNE PLUS DOWNPIPE ]
The Weistec M274 ECU upgrade for the 2015+ C300 provides gains across the entire powerband resulting a vehicle that is more fun to drive in all driving situations.  The M274 ECU upgrade can be paired with our M274 Downpipes for further improved response and engine feedback.  
 ECU Tuning Process: How do I get my ECU tuned? 
KEY FEATURES: 
- Increased HP and Torque
- Improved Throttle Response
- Optimized Fuel and Spark*Power gains vary based on model, modifications, fuel, and running conditions.