722.9 Master Rebuild Kit, new and ready to install. Fits the 722.9. Ships fast from the USA.
This is a complete master rebuild set for the Mercedes-Benz 722.9 seven-speed automatic, the 7G-Tronic, used in rear-drive and 4MATIC C, E, S, ML and GL models and in Sprinter vans. If your 7G-Tronic has been diagnosed with burnt clutches, drops into neutral as it shifts, or slips once it is hot, this kit supplies the parts for a bench overhaul at a lower price than our other 722.9 master sets. It combines three sub-kits under references B189820A, B189880A and W189881A: an overhaul seal and gasket kit, a friction plate kit and a steel plate kit.
The 722.9 makes seven forward gears from planetary gearsets controlled by multi-disc clutches and brakes. A mechatronic unit in the pan, valve body and control unit together, routes oil to each piston. A pack holds only while its piston seal holds pressure and its plates keep the correct clearance. Once frictions are burnt or steels heat-spotted, the control unit keeps trying to adapt around the slip until it gives up and sets limp mode. This kit renews the frictions, steels, piston and sealing rings, and gaskets. It does not include the mechatronic unit, conductor plate, torque converter, drums or planetaries.
Many 722.9 complaints start outside the clutch packs. ATRA's Gears magazine reports that deteriorated O-rings on the shift solenoid tips are the most common starting point, and a pack that burned because its solenoid leaked will burn again unless the valve body is resealed too. Mercedes-Benz's bulletin LI27.00-P-051451 for 722.9 shift complaints requires reading out the control unit log and EEPROM data before any adaptation is run, since that data is lost afterward. Scan first, check fluid level and condition, then drop the pan and look for friction material. Our 722.9 rebuild cost guide lays out that order and the cost of each path. If your car turns out to have the older five-speed, read the 722.6 common problems guide.
The listing identifies the kit only by transmission, the 722.9, with no year range. Over its run the 722.9 was revised, including the 7G-Tronic Plus update, and versions differ in converter, pump and control hardware. Compare the kit with your teardown and your case tag before you begin, or send us the year and VIN and we will check it. Other 722.9 sets and parts are on our 722 transmission page, including the T18900A 722.9 master rebuild kit if you want a set listed against specific models.
For the first fluid change after break-in, the 722.9 service kit with ATF and filter covers the fluid and filter.
| Fits | 722.9 |
| Part type | Master Rebuild Kit |
| Condition | New |
| 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 listed for the Mercedes 722.9 7G-Tronic, used in C, E, S, ML and GL models and Sprinter vans. The listing gives no year range, so match it to your case tag and teardown, or send us the year and VIN.
They are the reference numbers of the three sub-kits sold together here: the overhaul seal and gasket kit, the friction kit and the steel kit.
No. The mechatronic unit, conductor plate, solenoids, converter and hard parts are separate. Replace solenoid O-rings and inspect the valve body during the rebuild, since solenoid seal failure often causes the clutch damage.
Not necessarily. Read the control unit log and stored data first. Limp mode can come from solenoids, sensors or wiring. Only order the kit after the pan shows friction material or the fault points to clutch slip.
Use the Mercedes-approved ATF for your build. 236.15 fluid is approved for 7-speed units built since 2010; check your model's specification for earlier units. Set the level at temperature through the fill pipe.
