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HomeShopStage1 Tuning2003 – 2006 Mercedes-Benz CL 55 5.4 V8 Supercharged Stage1 Tuning Service | 512 HP / 563 TQ

Description

Stage 1 ECU/ECM Tuning Service – FixECM

Unlock Power • Improve Response • Enhance Driving Experience

What Is Stage 1 Tuning?

Stage 1 tuning is a software-only ECU/ECM remap designed to safely increase your engine’s power and torque without requiring any mechanical upgrades.
This upgrade focuses on optimizing factory parameters such as:

          Boost pressure

          Ignition timing

          Fuel delivery

          Throttle response

          Torque limits

          Air/fuel ratios

          Speed limiter & rev limiter adjustments

Manufacturers leave a large amount of “hidden power” inside the ECU for reliability margins, emissions limits, and global market conditions.
Stage 1 tuning safely unlocks this potential.


What Is an ECU/ECM Remap?

An ECU (Engine Control Unit) or ECM (Engine Control Module) remap means rewriting and optimizing the original calibration file inside your vehicle’s computer.

FixECM modifies the OEM software to:

✔ Increase horsepower & torque
✔ Improve throttle response
✔ Remove factory restrictions
✔ Optimize fuel and timing maps
✔ Enable smoother, stronger acceleration
✔ Reduce turbo lag
✔ Improve fuel economy under normal driving

This is not a cheap “OBD-flash tool tune.”
FixECM performs full read → remap → checksum correction → bench test for maximum reliability.


How Much Power Will Stage 1 Add?

Power gains vary by engine, but typical Stage 1 increases:

          Turbocharged Gas Engines:
          ✔ +35–70 HP
          ✔ +50–120 TQ

          Turbocharged Diesel Engines:
           ✔ +40–90 HP
          ✔ +70–160 TQ

          Naturally Aspirated Engines:
          ✔ +8–20 HP
          ✔ +10–25 TQ

Every tune is custom built for your specific ECU, not a universal file.


Local GTA/Toronto Customers

You can visit our shop directly for same-day tuning.
We remove the ECU (if required), remap it, test it, and reinstall—usually within same-day.

Canada & USA Mail-In Service

Not in Toronto? No problem.

        Mail your ECU/ECM to us

        We perform the Stage 1 remap

        Bench-test all functions

        Ship it back the same day

Fast turnaround • High reliability • Plug-and-play guaranteed.


Why Choose FixECM?

✔ Professional ECU bench tuning (not basic OBD flash)
✔ Real dyno-tested Stage 1 calibrations
✔ Safe, reliable, OEM-level quality
✔ No mechanical upgrades required
✔ Better drivability + stronger performance
✔ Local shop in Toronto + fast mail-in service
✔ 1-Year Warranty on all programmed ECUs

>>Need a replacement ECU/ECM? Check our replacement units available!<<

>>Check Our Stage1 Tuning Service!!!<<

Compatible vehicles

MakeModelYearEngine
Mercedes-BenzCL 552003 - 20065.4 V8 Supercharged

Customer reviews

(4 customer reviews)
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4 reviews for 2003 – 2006 Mercedes-Benz CL 55 5.4 V8 Supercharged Stage1 Tuning Service | 512 HP / 563 TQ

  1. Elijah Richardson

    I recently had the Stage1 tuning service done on my 2005 Mercedes CL 55, and the difference is incredible. The power boost to 512 HP feels smooth and responsive, making daily driving much more exciting. Their team provided professional ECU programming, and the entire process was seamless with quick updates along the way. Shipping was very reasonable too, which was a nice bonus.

  2. Elijah Webb

    The tuning service boosted my CL 55’s power perfectly, and they kept me informed every step of the way—highly recommend their communication and expertise.

  3. James Anderson

    I recently had the Stage1 tuning service done on my 2005 Mercedes CL 55, and I’m beyond impressed with the results. The increase to 512 HP and 563 TQ is noticeable the moment you hit the gas—my car feels completely transformed. What really stood out was how professional and clear the programming process was; they handled the ECU adjustments seamlessly, and I didn’t have to worry about a thing. On top of that, their communication was top-notch—they kept me in the loop every step of the way and answered all my questions promptly. Shipping was also surprisingly quick and didn’t cost a fortune, which made the whole experience even better. Overall, I’m thrilled with the power boost and the service quality.

  4. Jonah Taylor

    I decided to try the Stage1 tuning service for my 2005 CL 55, and I’m beyond impressed with the results. The increase to 512 HP and 563 TQ really transformed how the car drives—it’s noticeably more responsive and powerful. What stood out to me was how smoothly the programming process went; they handled all the ECU tuning remotely with a professional, plug-and-play setup, making it hassle-free. The team also kept me informed every step of the way, which I really appreciated. Overall, a fantastic upgrade that was worth every penny.

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