The AMG SpeedShift MCT 9 9-speed automatic transmission has been produced at the German plant since 2017, is used in the C63, E63, S63, GLC63 models in conjunction with the 4.0-liter M177 bi-turbo engine. Essentially, it’s a 725.0 transmission with a multi-plate wet clutch pack instead of torque converter.
Specifications
| Type | automatic transmission |
| Number of gears | 9 |
| Type of drive | rear / all wheel |
| Engine volume, l | 4.0 bi-turbo |
| Torque output, Nm | up to 900 |
| Recommended oil | ATF MB 236.17 |
| Oil capacity, liter | 9.9 |
| Partial replacement, liter | 8.2 |
| Maintenance | every 30 000 km |
| Gearbox lifespan, km | ~300 000 km |
| Weight, kg | 90 |
Gear ratios Mercedes AMG SpeedShift MCT 9
Using the 2020 Mercedes E63 AMG with a 4.0 bi-turbo engine as an example:
| Main | 3.06 |
| 1st | 5.354 |
| 2nd | 3.243 |
| 3rd | 2.252 |
| 4th | 1.636 |
| 5th | 1.211 |
| 6th | 1.000 |
| 7th | 0.865 |
| 8th | 0.717 |
| 9th | 0.601 |
| Reverse | 4.798 |
Using
The transmission was installed on:
- Mercedes AMG GT X290 in 2018 – …;
- Mercedes AMG GT C192 in 2023 – …;
- Mercedes C-Class W205 in 2018 – 2023; C-Class W206 in 2022 – …;
- Mercedes CL-Class C217 in 2017 – 2020;
- Mercedes E-Class W213 in 2017 – 2023;
- Mercedes GLC-Class X253 in 2017 – 2022; GLC-Class X254 in 2023 – …;
- Mercedes GLE-Class W166 in 2017 – 2018;
- Mercedes SL-Class R232 in 2021 – …;
- Mercedes S-Class W222 in 2017 – 2020; S-Class W223 in 2023 – …
Disadvantages of the Mercedes AMG SpeedShift MCT 9 gearbox
- This transmission is relatively new, and there’s very little information about its failures;
- Most complaints on specialized forums are related to harsh shifting in certain modes;
- The problem of jerking in cold weather, a familiar one from previous transmissions, hasn’t yet been resolved;
- If you avoid overheating and regularly change the oil, this automatic transmission will last a long time;
- The clutch pack here has a decent lifespan, but the cost of replacement is not encouraging.
