+136HP   +145TQ 

Through rigorous testing, on both the street and dyno, the Weistec M177 ECU Upgrade reliably extracts massive gains in the mid range of the powerband as well as substantial gains in the top end making the C63 / C63-S a top performer in all driving situations.

What does all this mean to you?  More power, sharper throttle response, and a complete focus on the driver makes this the perfect addition to your AMG for a much more enjoyable experience for you. 

*Power gains vary based on model and modifications.

*Product may not be emissions compliant.  Check local laws prior to installation.

ECU Calibration Process: How do I get my ECU Calibrated?

KEY FEATURES:

• Eliminated Top Speed Limiter**

• Improved Throttle Response

• Optimized Fuel, Spark, and Boost

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