Mercedes-Benz Transmission

722.5

The Mercedes-Benz 722.5 is a 5-speed automatic transmission with hydraulic shift control.

Years
1989–1997
Speeds
5
Control
Hydraulic
Max torque
294 N·m

A fifth gear bolted on — the transitional five-speed before the true 5G-TRONIC.

The 722.5 (W5A030) takes the hydraulic 4G-TRONIC and adds an electrically controlled overdrive fifth in a separate rear housing. Developed for the R129 SL and offered as an extra-cost option from about 1990 on the 300 SL-24, SL 280 and SL 320, then on the W140 S 280/S 320 and selected W124/W210 six-cylinder cars, it cut motorway revs without a full redesign — at the cost of two housings and two control systems. Torque capacity stays around 294 N·m, so it was never paired with V8s.

It was a stopgap: from 1996 the integrated, electronically shifted 722.6 5G-TRONIC replaced both the 722.5 and the remaining 4G-TRONIC applications.

Versions.

Every factory version of the 722.5.

VersionClassificationMax torqueApplications
722.500W5A030294 N·m (217 lb·ft)W124
722.502W5A030294 N·m (217 lb·ft)W124
722.507W5A030294 N·m (217 lb·ft)R129
722.508W5A030294 N·m (217 lb·ft)W140
722.509W5A030294 N·m (217 lb·ft)W210
722.510W5A030294 N·m (217 lb·ft)W210

Version codes 722.500–722.510 from mbmanuals; .507 is confirmed for SL 320 and .508 for S 320. Remaining codes are allocated across W124/W210 six-cylinder applications where the factory parts table is incomplete.

Applications.

Every model shifted by the 722.5.

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