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Mercedes-Benz C-Class W205 2.0 C220d OM654 (2014–2021) Remapping

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Available tuning estimates

Mercedes-Benz C-Class W205 2.0 C220d OM654 (2014–2021)

2014-2021 · Engine code OM654 · ECU family to be confirmed on the vehicle

MetricStockStage 1 (est.)Stage 2 (est.)
PowerPower estimate awaiting confirmationPower estimate awaiting confirmation—
Torque400 Nm460 Nm—

Stock

Power estimate awaiting confirmation / 400 Nm

Stage 1 (est.)

Power estimate awaiting confirmation / 460 Nm

Stage 1 price for this engine

Price on request

We confirm the price after reviewing your vehicle.

Stage 2: price on request. Power estimate awaiting confirmation.

Stage 1 remapping optimises ECU software for compatible vehicles in standard configuration. It's designed to improve performance, torque and throttle response without requiring performance hardware modifications.

  • • Mobile may be suitable, subject to ECU access, postcode, working space and availability within 50 miles of Slough.
  • • Estimated gains depend on condition, configuration and fuel. Your quote discusses expectations, not a guaranteed measured output.

Confirm this engine and software version

Mercedes-Benz C-Class W205, 2014-2021, C220d. Recorded engine code: OM654. ECU hardware and software to be confirmed on the vehicle. A model name alone is not proof of tuning compatibility. ECU hardware and software identification determine the programming or unlock route; no specific unlock is assumed from the badge.

Data label: Existing vehicle library estimate. These are typical library estimates, not independently verified STX measurements. Missing Stage 2 figures remain unavailable; hardware requirements must be checked for the proposed setup.

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535 Google Reviews

  • Jamiah Woodroffe

    Apr 2026

    Really five star service I’ve only got my car the day before I messaged on a Sunday just as an inquiry was more than Happy to take time of the day on a Sunday to fit me in last minute just want to think the whole team very professional and I absolutely love my car. I felt an instant power boost and explained everything to me and packages that I can definitely most likely in the future upgrade to will be definitely coming again.

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  • Tracy

    Jan 2026

    Amazing company, arrived within 2 hours of my call and fixed the problem where another garage had failed. So happy to have the issue resolved, technician was so nice and explained everything, excellent service, highly recommend STX Tuning

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  • Jake Bickmore

    Dec 2025

    STX Tuning were absolutely brilliant. The service was super fast — same day turnaround — and they solved an issue with my car that a main dealer claimed would cost me thousands to fix. It turned out the expensive repair wasn’t even necessary, and STX handled it quickly and professionally. Honest, efficient, and highly recommended!

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  • Matthew Mooney

    Nov 2025

    STX were great! (its within ONYX which confused me when I got there, no biggy, just for anyone else reading it). I happened to be arriving when a guy must have been starting their shift, super helpful and got me to the right person. On the way in they even took the time to show my son the Lambo they had, this type of service is so nice to receive. The young guy we spotted fitting the wheels later on, thank you! In for a Stage 1 remap, all done in 30 minutes, and car drives brilliantly and exceeded expectations. Also at a great price as well. All staff I met were super nice and helpful. Credit to you guys! I will definitely be choose these guys going forward! Highly recommend.

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