Chiptuning Mercedes-Benz CLS C257 (since 2017)
2 engines · +40 to +42 hp
Mercedes-Benz CLS C257: 2 engines — 2 diesel. The gain is +40 to +42 hp, with up to +102 Nm more torque. GAN GTL from 249 EUR, GAN GT from 399 EUR.
All Mercedes-Benz CLS C257 engines: exact gains
Standard output, output with GAN, the gain and the price for each box.
| Engine | STOCK → with GAN | Gain | Tuning boxes and prices | |
|---|---|---|---|---|
| Diesel · 2 engines | ||||
| 350 BlueTEC249 hp / 600 Nm | +42 hp+102 Nm |
GTL — 249 EUR · 284 hp GT — 399 EUR · 291 hp |
Select → | |
| 400d340 hp / 700 Nm | +40 hp+80 Nm |
GTL — 279 EUR · 374 hp GT — 459 EUR · 380 hp |
Select → | |
Each engine has its own tuning box: GAN GT / GTL or GAN GA / GA+. Prices are per box and include the current discount.
Not sure which engine you have?
Find your engine by the power output in your registration document: each version has its own module calibration.
Mercedes-Benz CLS C257 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
- +42 hpbest in this generation
350 BlueTEC 249 hp → 291 hp. The other engines gain at least +40 hp; check the table for each one.
- +102 Nmfor diesels
Diesels gain mostly torque: +80 to +102 Nm, which helps with overtaking and towing.
- GAN APPpower control via smartphone
SPORT, DYNAMIC, ECO and STOCK modes in the GAN app.
- 50 daystest drive
Feel the difference or get your money back, excluding delivery costs.
Mercedes-Benz CLS C257 remap: common questions
Which tuning box do I need for the Mercedes-Benz CLS C257?
Every engine in this generation is turbocharged, so it takes the GAN GT or GAN GTL. 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.