Mercedes-Benz R Class (W251) 2007-2009 R500L 382bhp remap figures
Thinking of remapping a Mercedes-Benz R Class R500L 382bhp? The standard car makes 382bhp and 530Nm; with a Stage 1 remap from our Leicester workshop we expect around 425bhp and 581Nm, up to +43bhp and +51Nm.
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 | 382 bhp | 425 bhp | +43 bhp |
| Torque | 530 Nm | 581 Nm | +51 Nm |
All maps at a glance
| Map | Power | Torque | Expected gain, up to |
|---|---|---|---|
| Stock | 382 bhp | 530 Nm | |
| Stage 1Maximum software-only performance | 425 bhp | 581 Nm | +43 bhp +51 Nm |
| Stage 1 EcoPerformance with economy in mind | 414 bhp | 577 Nm | +32 bhp +47 Nm |
| Eco mapEconomy first | 411 bhp | 574 Nm | +29 bhp +44 Nm |
Who is the Stage 1 map for?
- Drivers who want a sharper throttle and a small, honest gain from software alone.
- Owners who would rather keep the car standard in every other way.
- Anyone who wants the fullest software-only map for this engine, accepting that the gain is modest without a turbocharger.
What this means for your R Class
Naturally aspirated petrol engines have no boost to raise, so gains from software alone are more modest than on a turbocharged car and come from fuelling, ignition and throttle response.
This car is listed with a Bosch ME9.7 engine control unit. We read the ECU on your car and compare it with the software listed here before any work starts, so you know what to expect before you commit.
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 R Class R500L 382bhp?
We expect 425bhp and 581Nm against 382bhp and 530Nm as standard: up to +43bhp and +51Nm. 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 R Class R500L 382bhp?
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: 414bhp and 577Nm expected. The Eco map is economy first: 411bhp and 574Nm. Both still sit above the standard 382bhp and 530Nm.
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 R Class figures
Other petrol variants
All petrol R Class (W251) variants · R Class (W251) 2006> overview · All Mercedes-Benz figures