The 7G-Tronic 7-speed automatic transmission system, introduced by Mercedes-Benz, had been installed in almost all passenger vehicles.
Introduced at the end of 2003 in all 8-cylinder models, it quickly spread to 6- and 4-cylinder models as well.
No matter if petrol or common rail diesel engines, or rear-wheel or all-wheel drive, this system, internally referred to as NAG2, had been the transmission system used in the production of most vehicles, until the introduction of the 9-speed variants in 2014.
H3. NAG2 = new automatic transmission, 2nd generation
H3. Transmission code = 722.9xx
H3. Typical errors
Error code 0717