Bearing and seal set to rebuild the Mercedes 4MATIC transfer case on C, E, S, CL, CLS and GLK models, 2004-2015.
A 4MATIC Mercedes that drips fluid between the transmission and the front driveshaft, or picks up a whine that follows road speed, usually has a transfer case that needs bearings and seals. This kit rebuilds the car-line 4MATIC transfer case on 2004-2015 C-Class, E-Class, S-Class, CL, CLS and GLK models, so a sound case can be resealed instead of replaced.
On these cars the transfer case bolts to the back of the automatic, the 722.6 five-speed on the early cars and the 722.9 7G-Tronic on most later ones. It splits torque front and rear, about 40:60 on most sedans and coupes, and sends the front share to a short front driveshaft that runs alongside the engine to the front differential. Depending on the chassis the front drive is either a chain or a set of helical-cut gears on the output shaft, with a planetary center differential doing the split.
The case has its own small sump, separate from the transmission, and that fluid is Mercedes-approved ATF because the planetary set and clutches depend on its friction properties. The input and output bearings hold the shafts in line, and the lip seals at the input, the rear output and the front output keep that small volume of fluid in. Lose a little and the bearings run hot. Lose more and the gears and planetary wear quickly.
Find the source first. A light sweat at the transmission-to-transfer case seam is normal on these cars and does not need sealing; actual drops do. Also check the case vent, because a blocked breather pressurizes the case and pushes seals out. Our 722.9 fluid leak guide shows where the transmission itself leaks, so you do not rebuild the transfer case for a pan gasket or connector seal. For noise, disconnect the rear driveshaft to rule out the center support bearing before blaming the case, and check the level at the transfer case fill plug, not the transmission.
The kit cross-references NP604623, NP925485, 0159971246, 0139977246, NP312842 and NP577617. Listed fitment:
Mercedes changed transfer cases across these years and body styles, and some cars have had a case swapped. Compare the part number on your case with the references above, or send us the year, model and VIN and we will check it. This is a car-line kit; ML, GL and R-Class SUVs use a different case. More parts for these transmissions are on our Mercedes 722 collection page.
| Reference numbers | |
| Assembly | |
| Includes | |
| Fitment (C/CL/CLS) | |
| Fitment (E) | |
| Fitment (S/GLK) |
The E350 4MATIC is on the listed 2004-2014 E-Class fitment. Mercedes used different cases over those years, so compare the number on your case with the references in the fitment section, or send us the VIN and we will confirm it.
No. This kit is for the car-line 4MATIC case on C, E, S, CL, CLS and GLK models. The ML, GL and R-Class SUVs use a different transfer case and need a different kit.
The case has its own sump and takes Mercedes-approved ATF, not gear oil. Use the ATF your car calls for and fill through the transfer case fill plug. The front and rear differentials are separate and take hypoid gear oil.
A light sweat at that seam is normal and is not a reason to open the case. Drops of fluid, a low level at the transfer case fill plug, or fluid on the front driveshaft are the signs to reseal it.
Replace the planetary gear set if it is pitted, check the front driveshaft joints, and service the transmission if it is due. Clear the case vent too, so the new seals are not pushed out by pressure.
