Mercedes-Benz C Class (W203) 2001-2006 C180K 143bhp remap figures
The Mercedes-Benz C Class C180K 143bhp (2001-2006) is a petrol 1.8L model making 143bhp and 190Nm as standard. After a Stage 1 ECU remap we expect 168bhp and 222Nm - up to 25bhp and 32Nm 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 | 143 bhp | 168 bhp | +25 bhp |
| Torque | 190 Nm | 222 Nm | +32 Nm |
All maps at a glance
| Map | Power | Torque | Expected gain, up to |
|---|---|---|---|
| Stock | 143 bhp | 190 Nm | |
| Stage 1Maximum software-only performance | 168 bhp | 222 Nm | +25 bhp +32 Nm |
| Stage 1 EcoPerformance with economy in mind | 162 bhp | 219 Nm | +19 bhp +29 Nm |
| Eco mapEconomy first | 160 bhp | 218 Nm | +17 bhp +28 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 C 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.
Engine management is by a Siemens SIM4LKE 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 C Class C180K 143bhp?
We expect 168bhp and 222Nm against 143bhp and 190Nm as standard: up to +25bhp and +32Nm. 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 C Class C180K 143bhp?
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: 162bhp and 219Nm expected. The Eco map is economy first: 160bhp and 218Nm. Both still sit above the standard 143bhp and 190Nm.
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 C Class figures
Other petrol variants
- C180 129bhp 2001-2006
- C200K 163bhp 2001-2006
- C240 170bhp 2001-2006
- C230K 192bhp 2001-2006
- C320 218bhp 2001-2006
- C32 AMG 354bhp 2001-2006
- 55 AMG 367bhp 2004-2006
All petrol C Class (W203) variants · C Class (W203) 2001-2006 overview · All Mercedes-Benz figures