Mercedes-Benz SL (R230) 2003-2006 SL600 Bi-Turbo 500bhp remap figures
Stock, this 2003-2006 Mercedes-Benz SL petrol (5.5L) produces 500bhp and 800Nm. Our expected figures for a Stage 1 remap are 570bhp and 913Nm, an expected gain of up to 70bhp and 113Nm.
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 | 500 bhp | 570 bhp | +70 bhp |
| Torque | 800 Nm | 913 Nm | +113 Nm |
All maps at a glance
| Map | Power | Torque | Expected gain, up to |
|---|---|---|---|
| Stock | 500 bhp | 800 Nm | |
| Stage 1Maximum software-only performance | 570 bhp | 913 Nm | +70 bhp +113 Nm |
| Stage 1 EcoPerformance with economy in mind | 553 bhp | 904 Nm | +53 bhp +104 Nm |
| Eco mapEconomy first | 547 bhp | 898 Nm | +47 bhp +98 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 SL
Turbocharged petrol engines respond well to calibration changes: boost and timing are the main levers, and the result is a flatter, stronger torque curve as well as a higher peak.
This car is listed with a Bosch ME2.8 engine control unit. Older engine management is simpler to work with, but age matters: worn sensors, leaks and tired components can hold back what a remap delivers, which is why we run a diagnostic check first.
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 SL SL600 Bi-Turbo 500bhp?
We expect 570bhp and 913Nm against 500bhp and 800Nm as standard: up to +70bhp and +113Nm. 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 SL SL600 Bi-Turbo 500bhp?
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: 553bhp and 904Nm expected. The Eco map is economy first: 547bhp and 898Nm. Both still sit above the standard 500bhp and 800Nm.
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 SL figures
Other petrol variants
- SL55 AMG 500bhp 2002-2006
- SL 600 BiTurbo 509bhp 2006>
- SL600 Bi-Turbo 509bhp 2006>
- SL55 AMG 510bhp 2006-2008
- SL63 AMG 517bhp 2008-2011
- SL 500 382bhp 2008>
- SL 350 310bhp 2008>
- SL 500 306bhp 2002>
- SL 350 245bhp 2003>
- SL 300 227bhp 2009>
All petrol SL (R230) variants · SL (R230) 2002-2011 overview · All Mercedes-Benz figures