Chip Tuning Mercedes-Benz GLS X166 63 AMG
1 engine · +104 hp
Mercedes-Benz GLS X166: 1 engine — 1 petrol. Gains range from +104 to +104 hp, with up to +155 Nm of torque. GAN GTL from 379 EUR, GAN GT from 519 EUR.
All Mercedes-Benz GLS X166 engines: exact gains
STOCK output, output with GAN, gain and price for each module.
| Engine | STOCK → with GAN | Gain | Tuning modules and prices | |
|---|---|---|---|---|
| Petrol · 1 engine | ||||
| 5.5585 hp / 760 Nm | +104 hp+155 Nm |
GTL — 379 EUR · 673 hp GT — 519 EUR · 689 hp |
Select → | |
Each engine has its own tuning module: GAN GT / GTL or GAN GA / GA+. Prices are per tuning module 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 GLS X166 tuning: what changes
The tuning module sits between the sensors and the engine control unit (ECU) and adjusts their signals. Your manufacturer’s warranty is preserved: the ECU software is never changed, and the module can be removed at any time.
- Bluetoothsmartphone mode control
- 18 mappingsfine tuning for your engine

- 15 minutesfitted to the factory connectors
- IP67water and dust protection
- +104 hpbest in this generation
5.5 585 hp → 689 hp. The other engines gain from +104 hp; see the table for each one.
- up to +30%more power
GAN GT: up to 30%, GAN GTL: up to 25%, GAN GA+: up to 12%.
- GAN APPpower control via smartphone
SPORT, DYNAMIC, ECO and STOCK modes in the GAN app.
- 50 daystest drive
Enhanced performance or your money back, excluding delivery costs.
Mercedes-Benz GLS X166 chip tuning: questions
Which tuning module do I need for the Mercedes-Benz GLS X166?
All engines in this generation are turbocharged, so you need the GAN GT or GAN GTL. Find your engine in the table above: each row shows the module and the price.
Is a tuning module the same as a Stage 1 tune?
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.