Trucks / HGV · ECU Remapping
Mercedes Trucks Atego OM904 - 129 (Euro 4/5) 129 hp Tuning (2004–)
Factory specification and Stage 1 remap gains for the Mercedes Trucks Atego OM904 - 129 (Euro 4/5) 129 hp (2004–). A Stage 1 calibration adds 26 BHP and 80 Nm — software only, no hardware modifications required.
| Measure | Original | Stage 1 | Stage 2 |
|---|---|---|---|
Power BHP | 129 | 155 +26 BHP · +20% | 165 +36 BHP · +28% |
Torque Nm | 500 | 580 +80 Nm · +16% | 600 +100 Nm · +20% |
+26 BHP
Stage 1 power gain
+80 Nm
Stage 1 torque gain
Power & torque curves
Illustrative Performance Curve
Illustrative curve generated from published/estimated peak figures. This is not an individual rolling-road test. Power (BHP, solid) and torque (Nm, dashed) across engine speed (RPM); peak figures match the published database values.
Hover / touch the graph
Stock: 129 bhp · 500 Nm (peak)
Stage 1: 155 bhp · 580 Nm (peak)
Stage 2: 165 bhp · 600 Nm (peak)
Tuning tool compatibility
This ECU was not found in the manufacturer compatibility databases we cross-reference.
AutoTuner
Not listed
Not found in this manufacturer's published data — ask us, coverage updates frequently.
Alientech KESS3
Not listed
Not found in this manufacturer's published data — ask us, coverage updates frequently.
Magicmotorsport FLEX
Not listed
Not found in this manufacturer's published data — ask us, coverage updates frequently.
Dimsport New Genius / New Trasdata
Not listed
Not found in this manufacturer's published data — ask us, coverage updates frequently.
Existing customers upload their ECU file via the Regal Tuning File Portal. New to Regal? Request a quote first.
20+ years of ECU calibration
Ready to unlock your Mercedes Trucks Atego's real performance?
Tell us your truck and registration — we'll confirm support and the exact expected gains for your engine before any work begins.