Fabspeed Motorsports | Mercedes-Benz AMG 65 6.0L V12 Bi-Turbo XperTune Performance Software
- Currently shipping within the lower 48 states
Maximize your AMG 65's potential with Fabspeed’s dyno-proven ECU upgrade, delivering 120HP and 150 lb-ft torque gains (741HP/888TQ tuned) while maintaining factory reliability.
Why Choose XperTune?
- Massive Power Boost – Optimizes air/fuel ratios and boost pressure (621HP → 741HP)
- OBD-II Flash Convenience – No ECU removal required (unlike competitor bench-flash methods)
- Stock-Safe & Reversible – Factory settings saved for warranty/service visits
- Lifetime Warranty – Industry-leading coverage for peace of mind
Key Features:
- Fits all AMG 65 V12 models: S-Class (W221), SL-Class (R230), G-Class (W463)
- Co-developed in Germany/USA for precision calibration
- Smooths throttle response and mid-range torque delivery
- Windows-compatible handheld (Mac not supported)
How It Works:
- Read stock ECU data via OBD-II port
- Email file to Fabspeed for custom tuning (1-2 day turnaround)
- Flash optimized tune using included handheld
- Drive with supercar-level performance
Notes:
- Requires Windows PC for file transfer
- Device pairs to one vehicle permanently
- Not CARB compliant – for off-road/competition use
Compatibility:
- Mercedes-AMG 65 Models (M275 6.0L V12 Bi-Turbo):
- S-Class (W221)
- SL-Class (R230)
- G-Class (W463)
Fabspeed Motorsport | FS-MER-M275-ECU
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