722.9 Solenoid Kit, remanufactured and ready to install. Fits the 722.9. Ships fast from the USA.
A Mercedes S, E, ML or GL Class with the seven-speed automatic that slips on one shift, thumps into gear, or locks itself in second on the highway is a classic 722.9 complaint. This remanufactured kit is a full set of eight 722.9 solenoids. For the price of fixing one position you can renew every regulator on the electrohydraulic plate, which matters on a transmission where the failure is usually wear spread across all of them rather than one dead coil.
Unlike older Mercedes automatics with three on-off shift solenoids, the 7G-Tronic gives each shifting element its own variable pressure regulator. One solenoid controls overall working pressure, six feed the K1, K2 and K3 clutches and the B1, B2 and B3 brakes, and one applies the torque converter lockup clutch. The control unit, built into the conductor plate those solenoids plug into, ramps one element off while ramping the next one on. That overlap is why a slightly weak or leaking regulator shows up as a flare or a bump rather than a missing gear: the timing is off by a fraction of a second and you feel it.
Transmission Digest notes that most 722.9 complaints, loss of shift quality or the transmission staying in gear, trace to the solenoids and to the electrical connections between the car, the control module and the conductor plate. So scan the transmission module first and record which position is faulting. Inspect the round case connector for oil inside the plug; a leaking connector sets solenoid codes on perfectly good parts. If the module does not appear on the scan tool at all, you are looking at a control unit failure, not a solenoid job. Lockup codes on 2011-2013 units have their own mechanical causes, covered in our 722.9 shift solenoid symptoms guide. When new solenoids do not cure soft or harsh shifts, the regulator valve bores in the valve body may be worn, which our 722.9 pressure control guide explains along with the vacuum test used to find it.
This set fits the 722.9 seven-speed used across Mercedes S, E, ML and GL Class models. Mercedes revised the solenoids over the life of the transmission, and the 7G-Tronic Plus versions from 2011 on can differ, so lay your old solenoids next to the product photos and compare the body, the blue tip cap and the connector before you install. Not sure? Send us your year and VIN. If you already know your build year, the 2002-2011 solenoid kit and the 2011-2016 version are listed separately, and every part for this family is on the 722 transmission parts page.
If the valve body bores are worn as well, a replacement 722.9 valve body addresses both at once.
| Fits | 722.9 |
| Part type | Solenoid Kit |
| Condition | Remanufactured |
| Brand | OEM |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
It is a remanufactured set of eight 722.9 solenoids, enough to replace every solenoid position on the standard seven-speed electrohydraulic plate in one job.
The 722.9 seven-speed was used across S, E, ML and GL Class models among others. Check the tag on your transmission or send us your VIN and we will confirm the kit matches.
On the 722.9 the usual failure is O-ring wear on the solenoid tips, and that wear is shared by every solenoid. Replacing the full set with new seals avoids a second pan drop for the next leak.
Use ATF approved to MB 236.14 for units built before mid-2010 and MB 236.15 for later units, filled to the correct level at the specified temperature.
Not always. On 7G-Tronic Plus units built April 2011 to December 2013, Mercedes traced lockup codes P074100 and P278300 to converter and input shaft wear. Rule that out first.
