Chiptuning Mercedes-Benz GLS X166 (2015–2019)
5 engines · +42 to +86 hp
Mercedes-Benz GLS X166: 5 engines — 3 petrol and 2 diesel. The gain is +42 to +86 hp, with up to +136 Nm more torque. GAN GTL from 249 EUR, GAN GT from 399 EUR.
All Mercedes-Benz GLS X166 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 · 2 engines | ||||
| 350d258 hp / 620 Nm | +68 hp+136 Nm |
GTL — 249 EUR · 316 hp GT — 399 EUR · 326 hp |
Select → | |
| 350d249 hp / 620 Nm | +42 hp+105 Nm |
GTL — 249 EUR · 284 hp GT — 399 EUR · 291 hp |
Select → | |
| Petrol · 3 engines | ||||
| 500455 hp / 700 Nm | +86 hp+136 Nm |
GTL — 379 EUR · 528 hp GT — 519 EUR · 541 hp |
Select → | |
| 400333 hp / 480 Nm | +69 hp+94 Nm |
GTL — 279 EUR · 392 hp GT — 459 EUR · 402 hp |
Select → | |
| 450 AMG 3.0367 hp / 520 Nm | +62 hp+88 Nm |
GTL — 279 EUR · 418 hp GT — 459 EUR · 429 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?
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:
Mercedes-Benz GLS X166 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
- +86 hpbest in this generation
500 455 hp → 541 hp. The other engines gain at least +42 hp; check the table for each one.
- +136 Nmfor diesels
Diesels gain mostly torque: +105 to +136 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 GLS X166 remap: common questions
Which tuning box do I need for the Mercedes-Benz GLS X166?
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.