Fabspeed M278 4.7L Bi-Turbo XperTune Performance Software (FS.MER.M278.ECU)
SKU: 46862992928

Fabspeed M278 4.7L Bi-Turbo XperTune Performance Software (FS.MER.M278.ECU)

Sale price$1032.72 Regular price$1147.47
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  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 7 - Jul 12

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Description

Fabspeed M278 4.7L Bi-Turbo XperTune Performance Software (FS.MER.M278.ECU)Purchase Disclaimer: Fabspeed Motorsport does not condone the use of emission defeat devices for any vehicles used on public streets or roadways. Fabspeed Motorsport will not tamper, remove, disable, or bypass emissions equipment on a motor vehicle in accordance with 40 CFR Section 86. 1854. 12(a)(3), Clean Air Act 40 CFR 1068. 101(b). This includes software, known as tunes, that reprogram a motor vehicles electronic control module to alter engine

Purchase Disclaimer: Fabspeed Motorsport does not condone the use of emission defeat devices for any vehicles used on public streets or roadways. Fabspeed Motorsport will not tamper, remove, disable, or bypass emissions equipment on a motor vehicle in accordance with 40 CFR Section 86.1854.12(a)(3), Clean Air Act 40 CFR 1068.101(b). This includes software, known as tunes, that reprogram a motor vehicles electronic control module to alter engine performance and enable the removal of filters, catalysts, and other critical emissions controls.

Performance ECU software upgrade improves horsepower, torque, and driving characteristics of the M278 4.7L V8 BiTurbo Engine by reprogramming various sensor inputs, air/fuel ratios, and boost pressure.

FEATURES:

  • Fits all Mercedes-Benz 550 M278 4.7L V8 BiTurbo Vehicles: E-Class / S-Class / CL-Class / CLS-Class / SL-Class / M-Class / GLE-Class / GL-Class / GLS-Class

    • Stock - Varies by Model

    • Tuned - +100 HP / +110 TQ

  • Fabspeed Motorsport saves your stock/factory ECU settings so that you can revert your vehicle back to stock settings at any time

NOTE:This is not a physical/shipped product. This upgrade requires you to send us your ECU for re-programming. You will be emailed a download link with detailed instructions after adding this to your cart and checking out.Special requests and tune file upgrades may be subject to additional fees.

SHIPPING DETAILS:Shipping costs for sending an ECU to Fabspeed is the responsibility of the purchaser. The ECU will be tuned within 24-48 hours of receiving it and Fabspeed will then ship back the ECU using whatever method it was shipped in with. (For example: If you send in your ECU via Ground shipping, we will ship it back via Ground. If you ship it via Overnight, we will ship it back via Overnight.)

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 46862992928

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4.6 ★★★★★
Based on 933 reviews
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Verified Purchase
Randall S Jackson
Charlottesville, US
★★★★★ 5
JUST RIGHT
Color: 2024-2025 Black
PERFECT FIT WORKS AS ADVERTISED
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 27, 2026
J
Verified Purchase
Jose uribe
Birmingham, US
★★★★★ 4
No encaja exactamente
Color: 2024-2025 Black
No encaja exactamente
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 28, 2026
S
Verified Purchase
SAW
Los Angeles, US
★★★★★ 5
Fit and finish is great.
Color: 2024-2025 Black, Color: 2024-2025 Black
Looks just like the passenger side so now the cab looks submetrical. Only wish they were true grab handles but it is strong and secure. I did remove my stock speaker cover that has the JBL logo and placed it on the UltraEra pillar. Some work was involved.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 20, 2026
J
Verified Purchase
Juan A Gonzalez Skerrett
Dallas, US
★★★★★ 5
El consumidor
Color: 2024-2025 Black
Le quedó fenomenal a una Tacoma Sport, 2025
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 5, 2026
J
Verified Purchase
Jon Oz
Houston, US
★★★★★ 5
Must have and should be standard.
Color: 2024-2025 Black
Not sure why these aren't standard, but a must have. Fits like factory and bolts on rock solid. Easy install and took me about 10 mins. Color matches trim perfectly. Just wish I could've swapped the speaker cover with the JBL marked cover, but the factory uses push tabs and not screws. I didn't want create any loose parts that would vibrate later. For the cost, it isn't a bad accessory. Worth it in my opinion.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 20, 2025

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