9G-Tronic
The 9G-Tronic gearbox is fitted to 3 generation(s): Mercedes-Benz S-Class, Mercedes-Benz M-Class / GLE, Mercedes-Benz GL / GLS.
Common problems and what to check
Gearbox: Mercedes 7G-Tronic (722.9)
- control board failure (speed sensors)
- valve body wear
What to check when buying: limp mode, sensor error codes.
Tip: Oil every 60k km.