Mercedes-Benz C Class (W203) 2001-2006 C320 CDI 224bhp remap figures
The Mercedes-Benz C Class C320 CDI 224bhp (2001-2006) is a diesel 3.0L model making 224bhp and 510Nm as standard. After a Stage 1 ECU remap we expect 295bhp and 633Nm - up to 71bhp and 123Nm 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 | 224 bhp | 295 bhp | +71 bhp |
| Torque | 510 Nm | 633 Nm | +123 Nm |
All maps at a glance
| Map | Power | Torque | Expected gain, up to |
|---|---|---|---|
| Stock | 224 bhp | 510 Nm | |
| Stage 1Maximum software-only performance | 295 bhp | 633 Nm | +71 bhp +123 Nm |
| Stage 1 EcoPerformance with economy in mind | 277 bhp | 623 Nm | +53 bhp +113 Nm |
| Eco mapEconomy first | 272 bhp | 617 Nm | +48 bhp +107 Nm |
Who is the Stage 1 map for?
- Drivers who want stronger pulling power for overtaking, hills and towing, with no parts to fit.
- Daily and motorway drivers who want the engine to feel less strained at cruising speed.
- Anyone who wants the biggest software-only change we list for this engine.
What this means for your C Class
Diesel remaps work mainly on boost pressure, fuel delivery and torque limiters, which is why the Nm gain is usually the figure you feel in everyday driving, particularly when overtaking or towing.
Engine management is by a Bosch EDC16CP31 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 C320 CDI 224bhp?
We expect 295bhp and 633Nm against 224bhp and 510Nm as standard: up to +71bhp and +123Nm. 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 C320 CDI 224bhp?
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: 277bhp and 623Nm expected. The Eco map is economy first: 272bhp and 617Nm. Both still sit above the standard 224bhp and 510Nm.
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 diesel variants
- C270 CDI 170bhp 2001-2006
- C220 CDI 147bhp 2001-2006
- C220 CDI 143bhp 2001-2006
- C200 CDI 122bhp 2001-2006
All diesel C Class (W203) variants · C Class (W203) 2001-2006 overview · All Mercedes-Benz figures