Description
TuneZilla M278 – 4.7L ECU Tuning for Mercedes
Available through United Performance
TuneZilla calibrations are flashed through your vehicle’s OBD port with a FlashZilla device: read your factory file, download your chosen tune from the InstaTune server, and write it in. Switching between tunes or back to stock later uses the same tool.
Power & Torque
Factory baseline on TuneZilla’s dyno: 365 whp / 437 lb-ft — 429 hp / 516 lb-ft at the crank.
- Stage 1 — 406 whp / 502 lb-ft — 478 hp / 591 lb-ft at the crank (+41 whp / +65 lb-ft over stock)
All figures are TuneZilla’s own published dyno results, not a United Performance measurement, and are indicative rather than guaranteed.
Available ECU Tunes:
- Stage 1 — $1,154.56 CAD
Add-Ons (bundled pricing):
- Cat Delete — Cat Delete (add $143.06 CAD)
Fitment:
- Mercedes CL550 M278 – 4.7L 2011-2014
- Mercedes S550 M278 – 4.7L 2011-2013
- Mercedes SL550 M278 – 4.7L 2012-2015
- Mercedes GL550 M278 – 4.7L 2013-2015
FlashZilla tool — the flashing device is required to load any of these files. Add it to your order from the FlashZilla Tool option above for $205.00 CAD; if you already own one, leave it set to No and only the software is supplied.
The tune itself is delivered as a software file for your own FlashZilla device — no parts ship unless you add the tool.
