722.9 Sprag Clutch, new and ready to install. Fits the 722.9. Ships fast from the USA.
Although this item sits in our sprag clutch listings, it is a full 722.9 master rebuild kit for the Mercedes 7G-Tronic seven-speed automatic, not a one-way clutch. The box combines three sub-kits referenced B189820A, B189880A and W189881A: seals, sealing rings and gaskets including the pan gasket, a complete set of friction plates, and the steel plates. It suits the C350, E350, ML350 or GL450 owner, or the shop, facing a 722.9 that slips when hot, flares on upshifts, bumps hard into gear or has already been opened up and shows burnt packs.
Mercedes launched the 722.9 in 2003 as the first seven-speed automatic in a production car. It uses four planetary gearsets, three clutches and four brakes, and it has no bands, so every gear is held by a multi-plate pack under hydraulic pressure. The control unit and valve body sit together in the pan and time each apply by watching speed sensor signals. As the plates wear, the control unit stretches its adaptation values to cover the slip. Once a pack is burnt or a piston seal leaks, it runs out of range and sets limp mode. This kit renews the friction surfaces, the steels and the rubber that seals each apply circuit, giving the control unit a fresh baseline after the rebuild.
Many 722.9 faults begin outside the packs. ATRA's Gears magazine reports that cut or hardened O-rings on the solenoid tips are the most common starting point, so a new set of frictions behind a leaking solenoid will burn again. Read stored codes and save the control unit data before any adaptation reset, then check fluid level using the correct fill procedure and drop the pan to look for debris. Our 722.9 common problems guide lays out the factory bulletins in order, the harsh shift causes guide covers the engagement complaints that a relearn alone can fix, and the rebuild cost guide shows when a kit-based overhaul makes more sense than a replacement unit.
The kit is listed for the Mercedes-Benz 722.9 automatic with no year range given, so treat fitment as something to confirm. The 722.9 was built in several torque versions for rear-drive and 4MATIC cars and SUVs, and the 7G-Tronic Plus update around 2010 brought internal changes. During teardown, lay each new pack beside the old one and match plate count, diameter and tooth form before you assemble. Read the transmission number from the identification tag on the case, and if you want us to check it first, send the year and VIN. Every part we carry for this family is in the 722.6 and 722.9 collection.
| Fits | 722.9 |
| Part type | Sprag Clutch |
| 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.
No. It is a 722.9 master rebuild kit made of an overhaul seal and gasket set, a friction plate set and a steel plate set, referenced B189820A, B189880A and W189881A.
The listing covers the 722.9 without a year range. Because the unit came in several torque versions and was revised around 2010, match the plates to your originals at teardown or send us the year and VIN first.
No. The molded apply pistons, solenoids, filter, bushings and the torque converter are not in this kit. Most rebuilders replace the K1 piston and reseal or replace the solenoids at the same time.
Mercedes assigns 236.14 fluid to earlier 722.9 units and 236.15 to units built after the mid-2010 change. Use the one your transmission was built for and do not mix them.
Yes. The control unit has to relearn clutch fill on new plates. Reset adaptations with a Mercedes-capable scan tool and run the engagement relearn before normal driving.
