Mercedes-Benz C W203 Chiptuning – ECU Remap

At a glance

C W203: 24 engines — 13 petrol and 11 diesel. The gain is +15 to +64 hp, with up to +126 Nm more torque. GAN GTL from 219 EUR, GAN GT from 329 EUR. GAN GA+ from 189 EUR.

24

engines

13 petrol · 11 diesel

+64hp

best in this generation: 30 AMG 3.0d 231 → 295 hp

gain range +15…+64 hp

+126Nm

max torque gain

30 AMG 3.0d, GT

11

turbo engines

13 — GA / GA+

Power gains

All C W203 engines: exact gains

Standard output, output with GAN, the gain and the price for each box. Diesel and petrol engines are listed separately.

Engine	STOCK → with GAN	Gain	Tuning boxes and prices
Diesel · 11 engines
30 AMG 3.0d231 hp / 540 Nm	231 hp295 hp / 666 Nm	+64 hp+126 Nm	GTL — 249 EUR · 285 hp GT — 399 EUR · 295 hp	Select →
270 CDI170 hp / 370 Nm	170 hp218 hp / 475 Nm	+48 hp+105 Nm	GTL — 249 EUR · 211 hp GT — 399 EUR · 218 hp	Select →
270 CDI163 hp / 370 Nm	163 hp210 hp / 475 Nm	+47 hp+105 Nm	GTL — 249 EUR · 203 hp GT — 399 EUR · 210 hp	Select →
320 CDI224 hp / 415 Nm	224 hp269 hp / 522 Nm	+45 hp+107 Nm	GTL — 249 EUR · 262 hp GT — 399 EUR · 269 hp	Select →
220 CDI150 hp / 340 Nm	150 hp193 hp / 433 Nm	+43 hp+93 Nm	GTL — 249 EUR · 187 hp GT — 399 EUR · 193 hp	Select →
220 CDI143 hp / 315 Nm	143 hp185 hp / 403 Nm	+42 hp+88 Nm	GTL — 219 EUR · 179 hp GT — 329 EUR · 185 hp	Select →
220 CDI136 hp / 300 Nm	136 hp176 hp / 385 Nm	+40 hp+85 Nm	GTL — 219 EUR · 170 hp GT — 329 EUR · 176 hp	Select →
320 CDI Autom.224 hp / 510 Nm	224 hp262 hp / 597 Nm	+38 hp+87 Nm	GTL — 249 EUR · 255 hp GT — 399 EUR · 262 hp	Select →
200 CDI122 hp / 270 Nm	122 hp159 hp / 349 Nm	+37 hp+79 Nm	GTL — 219 EUR · 153 hp GT — 329 EUR · 159 hp	Select →
200 CDI116 hp / 250 Nm	116 hp151 hp / 325 Nm	+35 hp+75 Nm	GTL — 219 EUR · 146 hp GT — 329 EUR · 151 hp	Select →
200 CDI102 hp / 235 Nm	102 hp133 hp / 314 Nm	+31 hp+79 Nm	GTL — 219 EUR · 128 hp GT — 329 EUR · 133 hp	Select →
Petrol · 13 engines
55 AMG367 hp / 450 Nm	367 hp396 hp / 486 Nm	+29 hp+36 Nm	GA — 219 EUR · 396 hp GA+ — 219 EUR · 396 hp	Select →
280231 hp / 300 Nm	231 hp259 hp / 336 Nm	+28 hp+36 Nm	GA — 199 EUR · 259 hp GA+ — 199 EUR · 259 hp	Select →
32 AMG 3.2354 hp / 450 Nm	354 hp382 hp / 486 Nm	+28 hp+36 Nm	GA — 219 EUR · 382 hp GA+ — 219 EUR · 382 hp	Select →
320218 hp / 310 Nm	218 hp244 hp / 347 Nm	+26 hp+37 Nm	GA — 199 EUR · 244 hp GA+ — 199 EUR · 244 hp	Select →
230204 hp / 245 Nm	204 hp228 hp / 274 Nm	+24 hp+29 Nm	GA — 199 EUR · 228 hp GA+ — 199 EUR · 228 hp	Select →
230 Kompressor 1.8192 hp / 260 Nm	192 hp215 hp / 291 Nm	+23 hp+31 Nm	GA — 189 EUR · 215 hp GA+ — 189 EUR · 215 hp	Select →
350272 hp / 350 Nm	272 hp294 hp / 378 Nm	+22 hp+28 Nm	GA — 199 EUR · 294 hp GA+ — 199 EUR · 294 hp	Select →
200 Kompressor 1.8163 hp / 230 Nm	163 hp183 hp / 258 Nm	+20 hp+28 Nm	GA — 189 EUR · 183 hp GA+ — 189 EUR · 183 hp	Select →
200 Kompressor 2.0163 hp / 230 Nm	163 hp183 hp / 258 Nm	+20 hp+28 Nm	GA — 189 EUR · 183 hp GA+ — 189 EUR · 183 hp	Select →
240170 hp / 240 Nm	170 hp190 hp / 269 Nm	+20 hp+29 Nm	GA — 189 EUR · 190 hp GA+ — 189 EUR · 190 hp	Select →
180 Kompressor 1.8143 hp / 220 Nm	143 hp160 hp / 246 Nm	+17 hp+26 Nm	GA — 189 EUR · 160 hp GA+ — 189 EUR · 160 hp	Select →
160B122 hp / 190 Nm	122 hp137 hp / 213 Nm	+15 hp+23 Nm	GA — 189 EUR · 137 hp GA+ — 189 EUR · 137 hp	Select →
180129 hp / 190 Nm	129 hp144 hp / 213 Nm	+15 hp+23 Nm	GA — 189 EUR · 144 hp GA+ — 189 EUR · 144 hp	Select →

standard powergain with GAN

Each engine has its own tuning box: GAN GT / GTL or GAN GA / GA+. Prices are per box and include the current discount.

All Mercedes-Benz C generations C (W202) 2000 C (W204) 2007-15 C (W205) 2014->C (W206) 2021->C (L203)

Not sure which engine you have?

The badge alone is not enough: in this generation, the same engine designation came in different power outputs, each with its own calibration. Check the power output in your registration document and find the matching row.

Same badge, different factory power outputs in this generation:

270 CDI 163 / 170 hp220 CDI 136 / 143 / 150 hp200 CDI 102 / 116 / 122 hp

GAN tuning box for the Mercedes-Benz C W203

Mercedes-Benz C W203 remap: what changes

The GAN box plugs in between the sensors and the engine control unit (ECU) and adjusts their signals, while a flash remap rewrites the ECU itself. Your manufacturer’s warranty is preserved: the ECU software is never changed, and the box can be removed at any time.

Bluetoothchange modes from your phone
18 mapsfine-tuning for your engine

15 minutesfitted to the factory connectors
IP67water and dust protection

+64 hpbest in this generation
30 AMG 3.0d 231 hp → 295 hp. The other engines gain at least +15 hp; check the table for each one.
+126 Nmfor diesels
Diesels gain mostly torque: +75 to +126 Nm, which helps with overtaking and towing.
up to +12%with the GAN GA+ on naturally aspirated engines
For 9 naturally aspirated engines: GAN GA / GAN GA+ tuning boxes; check the table for each engine’s figure.
50 daystest drive
Feel the difference or get your money back, excluding delivery costs.

Prices for the Mercedes-Benz C W203

GAN GT from 329 EUR GAN GTL from 219 EUR GAN GA / GA+ from 189 EUR

Find your engine in the table

FAQs

Mercedes-Benz C W203 remap: common questions

Which tuning box do I need for the C W203?

Find your engine in the table above – each row shows the box and its price.

Is a tuning module the same as a Stage 1 remap?

Not quite. Stage 1 usually means an ECU remap without replacing any parts. The tuning module also works without replacing parts, but it does not change the ECU software: it adjusts the sensor signals, comes off in about a minute, and the OFF button in the app restores the factory settings.