Performance Without Compromise

RENNtech | ECU+ Upgrade | C63 /S AMG | Sedan | W205 | 601 HP / 657 LB-FT | 4.0L BiTurbo V8 | M177

ECU+ Upgrade | 601HP / 657TQ | Gains: +66HP / +107TQ
SKU: ECU:54.205W.C63BT
Base price $2,995.00
Sales price without tax $2,995.00

RENNtech has been at the forefront of ECU tuning since electronic engine management started to show up in vehicles during the mid 1980s! Our experience, countless hours of in-house research, development and exhaustive testing ensure that our proprietary ECU upgrade offers incredible performance gains and rock solid daily driver reliability.

RENNtech tuning software for Mercedes offers significant gains in horsepower and torque across the vehicles entire power band. By modifying ignition timing and throttle mapping, optimizing air-to-fuel ratios, increasing the engine's rev limiter and modifying boost mapping for turbo-charged vehicles, RENNtech performance software unleashes the true potential of your Mercedes.

With the proprietary RENNtech ECU+ Tuning the W205 - C 63 AMG gains up to +56 HP and +107 LB-FT, based on power numbers measured by RENNtech. Please note that the Mercedes M177 engine performance when measured, obtains higher numbers than rated from factory. The maximum power number reached with the RENNtech ECU+ Upgrade fo the W205 - C 63 AMG is up to 601 HP and 657 LB-FT.


For detailed information about our ECU+ Upgrades feel free to email us at This email address is being protected from spambots. You need JavaScript enabled to view it. or call our sales-team under 561.845.7888.



  • We have found the M177 engine stock performance numbers vary from the baseline figures claimed by Mercedes Benz. We typically see higher baseline numbers than claimed by the factory.
  • Power gains are calculated based on stock numbers measured by RENNtech. Crank Performance Numbers are calculated with a 14% Drivetrain loss on RWD vehicles.
  • Our numbers will be dependent on conditions and fuel quality. 93+ Octane gasoline is mandatory with this Performance Upgrade.
  • States known for poor fuel quality have to be supplied with a lower power setup. Please call for details and Race fuel options +1-561-845-7888.



Performance Numbers Overview 


C63 S AMG Coupe (C205 | MY2016+ | RWD | M177 | 4.0L V8 BiTurbo) Stock Performance (at crank):

  • Rated by Mercedes-Benz:      503 HP @ 5,500-6,250rpm; 516 LB-FT @ 1,750-4,500rpm
  • Rated by RENNtech:               545 HP @ 6,150rpm; 550 LB-FT @3,700-4,700rpm
    • Note: Mercedes M177 engine performance when measured, obtains higher power numbers than rated from factory.



C63 (S) AMG Coupe (C205 | MY2016+ | RWD | M177 | 4.0L V8 BiTurbo) Modified Performance (at crank):

  • Rated by RENNtech:               601 HP @ 5,650rpm; 657 LB-FT @ 4,250-4,800rpm
                                                    517whp @ 5,650rpm; 565wtq @ 4,250-4,800rpm
    • Crank Performance Numbers are calculated with a 14% Drivetrain loss on RWD vehicles.



Contact us

7825 SW Ellipse Way, Stuart, FL 34997
(+1) 561 - 845 7888
Mon - Fri 9am - 6pm
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7825 SW Ellipse Way - Stuart, FL 34997
TEL: 561.845.7888 FAX: 561.845.6777 E-MAIL: