Mercedes-Benz CLS (C257) 2018> 350 AMG 294bhp remap figures
Thinking of remapping a Mercedes-Benz CLS 350 AMG 294bhp? The standard car makes 294bhp and 400Nm; with a Stage 1 remap from our Leicester workshop we expect around 360bhp and 547Nm, up to +66bhp and +147Nm.
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 | 294 bhp | 360 bhp | +66 bhp |
| Torque | 400 Nm | 547 Nm | +147 Nm |
All maps at a glance
| Map | Power | Torque | Expected gain, up to |
|---|---|---|---|
| Stock | 294 bhp | 400 Nm | |
| Stage 1Maximum software-only performance | 360 bhp | 547 Nm | +66 bhp +147 Nm |
| Stage 1 EcoPerformance with economy in mind | 344 bhp | 535 Nm | +50 bhp +135 Nm |
| Eco mapEconomy first | 338 bhp | 528 Nm | +44 bhp +128 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 CLS
Without a turbocharger the improvement comes from ignition, fuelling and throttle mapping rather than boost, so expect a smaller but still noticeable change in response.
Engine management is by a Bosch MED17.7.7 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 CLS 350 AMG 294bhp?
We expect 360bhp and 547Nm against 294bhp and 400Nm as standard: up to +66bhp and +147Nm. 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 CLS 350 AMG 294bhp?
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: 344bhp and 535Nm expected. The Eco map is economy first: 338bhp and 528Nm. Both still sit above the standard 294bhp and 400Nm.
Do I need to tell my insurer about a remap?
Yes. A remap is a modification, so you should declare it to your insurer.
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