Performance Chip Tuning Mercedes-Benz C L203
3 engines · +35 to +44 hp
C L203: 3 engines — 3 diesel. Gains run from +35 to +44 hp, with up to +99 Nm more torque. GAN GTL from 219 EUR, GAN GT from 329 EUR.
All C L203 engines: exact gains
STOCK output, output with GAN, gain and price for each module.
| Engine | STOCK → with GAN | Gain | Tuners and prices | |
|---|---|---|---|---|
| Diesel · 3 engines | ||||
| Sport Coupe 220 CDI150 hp / 340 Nm | +44 hp+99 Nm |
GTL — 249 EUR · 188 hp GT — 399 EUR · 194 hp |
Select → | |
| Sport Coupe 30 AMG 3.0d231 hp / 540 Nm | +39 hp+92 Nm |
GTL — 249 EUR · 263 hp GT — 399 EUR · 270 hp |
Select → | |
| Sport Coupe 200 CDI122 hp / 270 Nm | +35 hp+78 Nm |
GTL — 219 EUR · 153 hp GT — 329 EUR · 157 hp |
Select → | |
Each engine gets its own performance chip: GAN GT / GTL or GAN GA / GA+. Prices are per performance chip and include the current discount.
Not sure which engine you have?
Find your engine by its horsepower – check your window sticker or decode your VIN. Each version has its own calibration.
Mercedes-Benz C L203 tune: what changes
The module plugs in between the sensors and the engine control unit (ECU) and adjusts their signals. It never rewrites your ECU software: your factory warranty is preserved, and the module can be removed at any time.
- Bluetoothswitch modes from your phone
- 18 mapsto fine-tune your engine
- 15 minutesplug-and-play install
- IP67water and dust protection
- +44 hpbest in this generation
Sport Coupe 220 CDI 150 hp → 194 hp. The other engines gain +35 hp and up; check the table for each one.
- +99 Nmfor diesels
Diesels gain mostly torque: +78 to +99 Nm for towing and hauling.
- GAN APPpower control via smartphone
Switch between SPORT, DYNAMIC, ECO and STOCK in the GAN app.
- 50 daystest drive
Enhanced performance or your money back, excluding shipping costs.
Mercedes-Benz C L203 tuning FAQ
Which tuner do I need for my C L203?
Every engine in this generation is turbocharged, so you’ll want the GAN GT or GAN GTL. Find your engine in the table above – each row shows the tuner and the price.
Is a tuning module the same as a Stage 1 tune?
Not quite. Stage 1 usually means an ECU flash tune 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.