Mercedes 725.0 9G-Tronic ATF Fill and Level Check Kit, 8-Piece

The Mercedes 725.0 9G-Tronic has no dipstick and no conventional fill tube. Fluid goes in through the drain/fill port in the pan under pressure, and the level is set by a check tool at a specified fluid temperature with the engine running. Without the right adapters you cannot service it correctly. This 8-piece kit covers that job on the 9-speed 725.0, the 8-speed front-drive versions, and the hybrid variants.

It replaces the factory tools 725 589 00 90 00, 725 589 02 90 00, 725 589 03 90 00 and 724 589 00 21 00, and lines up with GM J-52972-1. Vehicle coverage includes 9G-Tronic C-Class, E-Class, S-Class, GLA, GLC, GLE and GLS, plus the Nissan Frontier (D41), Titan, Z (RZ34) and Infiniti QX80 that use the same 9-speed.

In the case: 8mm oil pan wrench, 8mm socket adapter, oil drain plug, M12x1.5 ATF fill adapter, hybrid filler neck, level check tool, two fluid drain tools, a reminder tag and a pair of oil-resistant gloves. Typical procedure: drain through the pan, thread the M12x1.5 adapter into the fill port, pump in fresh 236.17-spec fluid until it runs out, then start the engine, bring the fluid into the specified temperature window with the scan tool reading, and set level with the check tool. Hang the reminder tag on the steering wheel so the car does not leave with the adapter still in.

Overfilled or underfilled 9G-Tronic units show up as harsh 2-3 and 3-4 shifts, flare on downshifts and fluid weeping from the vent. Most of those comebacks trace back to a level set at the wrong temperature or with the wrong adapter. This kit keeps the fill correct on every service.