Skip to content

How it works Runs Tuning Services FAQ BlogContact

Tuning
Tuning
Mercedes-Benz
GLS-Class
X166

Mercedes-Benz GLS-Class X166 tuning

Pick your engine.

3.0L 350 BlueTEC OM642LSDE30LA258 PS · Diesel · 2012–2019
3.0L V6 350d 24v OM642LSDE30LA258 PS · Diesel · 2012–2019
3.0L V6 400 24v M276DELA30333 PS · Petrol · 2012–2019
4.7L 500 4MATIC M278DE46AL455 PS · Petrol · 2012–2019
5.5L AMG 63 4MATIC M157.982585 PS · Petrol · 2012–2019

Ready when your car is

Tuners send a file to the file service. Car owners book a slot at the workshop.

Register for file service Talk to the workshop

ECU and TCU calibration, in our workshop or as a remote file service for tuners.

Explore

How it works
Runs
Tuning
Services
FAQ
Blog
Resources
Contact

Get started

Portal
Register
Contact

Hours

Mon to Sat: 09:00 to 21:00
Sun: Closed

German time (CET, CEST in summer)

© 2026 GTECH Calibration