Mercedes-Benz GTS AMG 2018> 4.0 V8 Bi-Turbo 639bhp remap figures
The Mercedes-Benz GTS AMG 4.0 V8 Bi-Turbo 639bhp (2018>) is a petrol 4.0L model making 639bhp and 899Nm as standard. After a Stage 1 ECU remap we expect 705bhp and 927Nm - up to 66bhp and 28Nm more than stock.
Choose your map
Stage 1 remap figures
A Stage 1 remap is a software-only change to the ECU on an otherwise standard car. It needs no extra parts, which makes it the usual starting point.
| Stock | Vanguard expected | Expected gain, up to | |
|---|---|---|---|
| Power | 639 bhp | 705 bhp | +66 bhp |
| Torque | 899 Nm | 927 Nm | +28 Nm |
All maps at a glance
| Map | Power | Torque | Expected gain, up to |
|---|---|---|---|
| Stock | 639 bhp | 899 Nm | |
| Stage 1Maximum software-only performance | 705 bhp | 927 Nm | +66 bhp +28 Nm |
| Stage 1 EcoPerformance with economy in mind | 689 bhp | 925 Nm | +50 bhp +26 Nm |
| Eco mapEconomy first | 683 bhp | 923 Nm | +44 bhp +24 Nm |
Who is the Stage 1 map for?
- Drivers who want a noticeably quicker car from a software-only change, with no new parts.
- Daily drivers who want stronger mid-range pull and a sharper throttle.
- Anyone who wants the biggest gain we list without fitting hardware.
What this means for your GTS AMG
On a turbocharged petrol engine a remap adjusts boost, ignition timing and fuelling together, so both power and mid-range torque rise and the car pulls harder out of corners and junctions.
This car is listed with a Bosch MED17.7.5 engine control unit. Newer ECUs often protect their software, so we read the exact unit and version on the car before confirming the figures on this page.
We remap at our Belgrave Gate workshop in Leicester, or at your home or work within 30 miles, and every job starts with a diagnostic check.
Please note: these are expected figures, not guarantees. Real results vary with the condition of the vehicle, the ECU software version, fuel quality and the hardware fitted. Some options - including Stage 2 and anything that needs extra hardware - are for off-road or competition use only. We check every vehicle first and confirm what is achievable before any work starts.
Figures reviewed 22 October 2026.
Stage 1 questions
How much power does the Stage 1 map give the Mercedes-Benz GTS AMG 4.0 V8 Bi-Turbo 639bhp?
We expect 705bhp and 927Nm against 639bhp and 899Nm as standard: up to +66bhp and +28Nm. These are expected figures, and we confirm what is achievable on your own car after a diagnostic check.
Does a Stage 1 remap need any extra parts on the Mercedes-Benz GTS AMG 4.0 V8 Bi-Turbo 639bhp?
No. Stage 1 is a software-only change to the ECU on an otherwise standard car.
Is there a gentler map than Stage 1 for this engine?
Yes, two. Stage 1 Eco is performance with economy in mind: 689bhp and 925Nm expected. The Eco map is economy first: 683bhp and 923Nm. Both still sit above the standard 639bhp and 899Nm.
Do I need to tell my insurer about a remap?
Yes. A remap is a modification, so you should declare it to your insurer.
More Mercedes-Benz GTS AMG figures
Other petrol variants
All petrol GTS AMG variants · GTS AMG 2015> overview · All Mercedes-Benz figures