Mercedes-Benz Transmission

725.0

The Mercedes-Benz 725.0 is a 9-speed automatic transmission with electronic shift control.

Years
2013–present
Speeds
9
Control
Electronic
Max torque
900 N·m
Mercedes-Benz 725.0 9G-TRONIC Automatic Transmission transmission

Nine speeds, one aluminum case — Mercedes-Benz’s answer to the multi-ratio automatic wars.

The 725.0 9G-TRONIC (NAG3) debuted in 2013 in the W212 E 350 BlueTEC as the world’s first nine-speed torque-converter automatic for a premium passenger car. Four planetary gearsets, a wide ratio spread and a chain-driven oil pump cut revs and fuel use while keeping shifts smooth. Classifications run from W9A400 to W9A900 (and hybrid HW9A/HW9B variants), naming each version’s maximum input torque — up to roughly 1,000 N·m in the strongest calibrations.

It succeeded the 7G-TRONIC across most longitudinal Mercedes-Benz lines: C-, E- and S-Class, GLC/GLE/GLS, CLS, the R172 SLC and later the R232 AMG SL. From about 2020 the facelifted 725.1 shares the same ratio family on newer platforms. Licensed to Jatco as the JR913E for Nissan and Infiniti; Aston Martin’s DBX also uses it.

Versions.

Every factory version of the 725.0.

VersionClassificationMax torqueApplications
725.0400W9A400400 N·m (295 lb·ft)R172, W205, W213
725.0500W9A500500 N·m (369 lb·ft)C257, W205, W212, W213, X253
725.0700W9A700700 N·m (516 lb·ft)C292, W166, W167, W213, W222, X166
725.0900W9A900900 N·m (664 lb·ft)W167

Factory sub-version numbers (725.0xx) are numerous; rows here are grouped by W9A torque classification. Hybrid HW9A/HW9B calibrations share the same gearset family. From about 2020 the facelifted 725.1 covers newer platforms — see that page. Non-Daimler licensees (Jatco JR913E, Aston Martin DBX) are noted in the overview.

Applications.

Every model shifted by the 725.0.

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