Mercedes CLS63s

Custom ECU Tune

$1,999.00

Stage

Horsepower 665HP
558 HP +107
FactoryMomentum Tuned →
Torque 752LB-FT
532 LB-FT +220
FactoryMomentum Tuned →

[ Optional Add-Ons ]

Email us about this tune
  • Houston shop in Sugar Land
  • Remote flash anywhere in the US
  • Custom file for your engine, mods and fuel
  • We confirm fitment before anything is written

Before you buy

  • We confirm your engine, existing mods and fuel before any file is written. If your car cannot be calibrated, nothing is written and the order is refunded.
  • Calibration files are built for your vehicle and cannot be returned once delivered. Parts follow the 30-day return policy.
  • Emissions rules differ by state and country. Compliance where the vehicle is driven on public roads is the owner's responsibility.

How your tune happens

  1. Order and confirm Add the tune to your cart or request a consultation. We confirm your exact year, engine and any hardware already on the car before anything is written.
  2. Flash method Depending on the platform, the tune loads through the OBD port with a handheld flasher we ship to you, or the ECU is unlocked once on the bench at our Sugar Land shop. The brand notes below say which applies to your car.
  3. Calibration Your file is built for your engine, fuel (91 or 93 octane) and hardware. Stage 2 files assume downpipes are installed; if yours are not, the downpipes for your car are listed on this page.
  4. Datalog and revise After the first drive we review logs and adjust. Revisions during the break-in period are included.
  5. Support Return to stock is always available. Questions before or after: email us and we will get back to you.

Mercedes-AMG engines (M133, M139, M156, M157, M177, M178, M256) run Bosch MED17.7 family ECUs. Most 2016 and newer cars require the ECU to be removed and unlocked once on the bench; after that the tune loads through the OBD port. Cars from 2018 on also have a CPC module that must be unlocked for the tune to take effect; that is the CPC add-on on this page. Stage 2 is written for downpipes and needs them fitted. Turnaround for a bench unlock is typically same day at the shop.

Stage 2 is written for downpipes; the ones for your car are listed below