Mercedes-Benz 9G-Tronic 9-Speed Automatic Transmission · Mercedes-Benz · Expert rebuild service since 1987. Lifetime warranty. Free diagnostic.
2013–present Mercedes-Benz C-Class (W205/W206), 2016–present E-Class (W213), 2017–present GLC/GLE/GLS, 2013–present S-Class (W222/W223) — 9-speed equipped variants
| Configuration | 9-speed automatic RWD/4MATIC transmission |
|---|---|
| Gear Ratios | 1st 5.51:1 · 2nd 3.48:1 · 3rd 2.19:1 · 4th 1.52:1 · 5th 1.19:1 · 6th 1.00:1 · 7th 0.84:1 · 8th 0.71:1 · 9th 0.60:1 · Rev 4.18:1 |
| Fluid Type | Mercedes-Benz ATF (MB 236.17) |
| Fluid Capacity | 10.5 qts total, 5.0 qts service refill |
Early 9G-Tronic units had harsh shift quality addressed through Mercedes TCM software updates. Verify all TSBs are applied before authorizing mechanical service.
Symptoms: Abrupt 1-2 shift, gear hunting at highway cruise, hesitation when selecting D from N — check TSBs first
The 9-speed mechatronic complexity increases failure exposure. Conductor plate failure on high-mileage units produces the same limp mode symptoms as earlier 7G-Tronic units.
Symptoms: Limp mode, DTC codes across P0750 range, erratic 9-speed shift pattern
TCC shudder developing in 8th–9th gear overdrive range on higher-mileage units. Fluid condition is primary cause.
Symptoms: Light vibration at 65–80 mph under light throttle, DTC P0740, improved with fresh MB 236.17
9G-Tronic rebuild replaces mechatronic/conductor plate, full solenoid set, all nine-speed clutch packs, and all seals. TCM updated to latest Mercedes calibration. MB 236.17 fluid used.
MB 236.17 ATF every 40,000 miles. Check for Mercedes TSBs before any mechanical service — early 9G-Tronic shift quality issues are often resolved with TCM software updates at no parts cost.
Post-2013 C-Class, E-Class, GLC/GLE/GLS, and S-Class models equipped with 9-speed automatic — phasing in from 2013 and becoming standard across most models by 2016.
Generally yes — it's a well-designed 9-speed. Early shift quality issues were software-related. Fluid maintenance is essential for long-term reliability.
A full rebuild ranges $2,600–$3,400 at Chicago Transmission.
Mercedes-Benz MB 236.17 ATF — this is a newer spec and not interchangeable with MB 236.14 used in 7G-Tronic models.
Check for Mercedes TSBs first. Many early 9G-Tronic shift quality complaints are resolved with a free TCM software recalibration.
Free diagnostic, written estimate, lifetime warranty. Chicago's 9G-Tronic (722.9x) rebuild specialists since 1987.
