BenzUnited Parts
Custom ECU Tune for Mercedes C63 / C63S AMG (M177)
Custom ECU Tune for Mercedes C63 / C63S AMG (M177)
Custom Tuning — Contact for Quote
This tuning service is custom-tailored to your build. Please contact us with your vehicle's year, model, engine, and mods for pricing.
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Custom ECU Tune
M177 4.0L BiTurbo V8 (W205 C63 / C63S)
Unlock serious gains from your C63 / C63S (W205) with our custom ECU calibration for the M177 twin-turbo V8.
Tuned Output (with Catless Downpipes)
- C63 / C63S: up to 590 WHP / 620 WTQ on 91 octane*
*Results vary with fuel quality, elevation, and supporting mods.
Why Choose Our ECU Tune?
- Refined drivability: throttle and boost control mapped for smooth part-throttle and hard pulls
- 3 custom maps included: choose throttle response, burble intensity, and where full boost ramps in
- Multi-fuel support: 91 / 93 / 98 / 100 octane options
- Dealer-safe: retains OEM fail-safes and protection strategies
- Built for your setup: calibrated around your exact hardware and goals
How It Works
- Order & ship: We send the MyGenius Handheld Programmer and provide tracking.
- Read stock file: Plug in, read your ECU, and email us the stock file.
- Receive 3 maps: We deliver three fully customized maps (throttle, burbles, boost-in RPM) for your chosen fuels (91/93/98/100).
- Flash at home: Load the maps in minutes. Swap maps anytime with the handheld.
No shop visit. No downtime. Flash from your garage.
Complementary Power Mods
- 🔧 Catless Downpipes — faster spool, lower backpressure
- 🧊 M177 Intake Spacer — lower IATs, smoother flow
- 🧊 Front-Mount Heat Exchanger — improved thermal control
- 🧊 Auxiliary Heat Exchanger — fights heat soak under repeated pulls
$350 off tuning when bundled with our catless downpipes.
🔥 Shop Catless Downpipes & Save $350 →
MyGenius handheld included. Flash at home — no shop required.
Before vs After
| Metric | Stock | Tuned + Downpipes |
|---|---|---|
| Horsepower | 469–503 HP | Up to 625 HP |
| Torque | 479–516 lb-ft | Up to 650 lb-ft |
| Throttle Response | Mild lag | Immediate |
Frequently Asked Questions
Will this tune trigger a CEL?
No — our calibrations are built to avoid CELs with or without downpipes.
Can I switch maps on my own?
Yes — use the MyGenius to swap between your three custom maps anytime.
Is it safe?
Yes — we retain OEM fail-safes and calibrate conservatively for your fuel and hardware.
Your AMG Deserves More
Custom-built power. Flash at home. Save $350 with downpipes.
Questions about compatibility or install? Email us — we’re happy to help.
⚠️ For off-road use only where permitted. Tunes are custom-built for each vehicle. Results depend on fuel quality, mods, and elevation.
