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Mercedes-Benz has built its own automatic transmissions for over six decades, and the 722 designation covers one of the longest continuous gearbox lineages in the industry - from the hydraulic units of the 1960s to today’s electronically controlled 9-speeds. Mercedes-Benz automatics are known for robust engineering and long service life, and they traveled beyond the brand itself: the 722.6 served in Jeep and Chrysler models (as the NAG1), and Mercedes-derived automatics were fitted to certain classic Porsche 928 applications. Whether you are maintaining a classic or servicing a current-generation car, correct identification by the 722 code on the transmission plate is the starting point for every repair.
722.6 (5G-Tronic): conductor plate failure (speed sensors) causing limp mode; torque converter lock-up wear with shudder at low speeds; valve body wear with harsh shifts; radiator coolant intrusion on some applications.
722.9 (7G-Tronic): conductor plate and integrated TCM failures causing no-shift or limp mode; valve body solenoid wear with delayed shifting; early versions sensitive to overheating.
722.8 (CVT): belt and pulley wear; control unit faults.
725.0 (9G-Tronic): mechatronic faults with shift hesitation or gear hunting; torque converter wear at high mileage; adaptation must be performed after repairs.
Classic 722.3 / 722.4: valve body wear and vacuum modulator issues - simple units that respond well to correct adjustment.
Our store solutions: overhaul kits, conductor plates, TCM modules, solenoids, valve body components, friction and steel plates, torque converter parts and complete rebuild kits - OE, OEM and selected aftermarket, depending on the unit.
722.0 / 722.1 / 722.2 - the early hydraulic automatics of classic Mercedes-Benz models from the 1960s and 1970s.
722.3 / 722.4 / 722.5 - the 4- and 5-speed workhorses of the 1980s and 1990s (W4A040, W4A020 and the 5-speed 722.5 development), including the units fitted to certain classic Porsche 928 applications. Valued for simplicity and durability.
722.6 (5G-Tronic) - the legendary electronically controlled 5-speed introduced in the mid-1990s: E-Class, S-Class, ML, G-Class, Sprinter, plus Jeep Grand Cherokee and Chrysler models as the NAG1. Millions built, still in service everywhere.
722.7 - the compact 5-speed developed for the A-Class and Vaneo front-wheel-drive platform.
722.8 (Autotronic CVT) - the belt-driven CVT of A- and B-Class models.
722.9 (7G-Tronic) - the 7-speed widely used across the rear-wheel-drive and 4Matic Mercedes-Benz range from the mid-2000s onwards, C-Class to S-Class, including AMG variants.
725.0 (9G-Tronic) - the current 9-speed generation, installed across the modern range including hybrid models.
AMG performance variants - reinforced 7G/9G-based units, including the AMG Speedshift MCT with a wet startup clutch instead of a torque converter.
The intervals below are general MID Auto workshop guidance. The exact fluid specification, quantity, service procedure and interval must be confirmed by transmission code, VIN and the vehicle manufacturer’s documentation.
Mercedes-Benz officially describes many of its gearboxes as filled for life, but service practice consistently favors fluid changes. As general guidance: 722.6 - fluid and filter around every 60,000 km; 722.9 - every 50,000-60,000 km with conductor plate checks; 725.0 - every 60,000-80,000 km, strictly with the exact Mercedes-Benz fluid approval required for the specific variant and vehicle (ATF 134 family). Using the exact approved specification matters as much as the interval itself.
