722.6 Solenoid Kit 2001-2005, remanufactured and ready to install. Fits the 722.6. Ships fast from the USA.
If your 2001-2005 Mercedes C240 holds second gear after a cold start, flares between second and third, or drops into limp mode with a transmission fault stored, the solenoids in the 722.6 five-speed are one of the first things to test. This is a remanufactured set of six 722.6 solenoids listed for the C240 with the 2.6L V6, and the same set is cataloged for the 2001-2004 C320 sedan, 1998-2005 E320 sedan, 1998-2003 ML320, and 2003-2005 ML350 and ML500. Replacing all six at once puts every electrical control point in the valve body back to a known state instead of guessing which one is weak.
The 722.6 shifts entirely under electronic control: the transmission control module decides every gear change and carries it out through six solenoids mounted in the valve body. Three are shift solenoids, one for the 1-2 and 4-5 shifts, one for 2-3 and one for 3-4, and each one is energized only while its shift is happening, then switched off. Two more are variable pressure regulators: the modulating pressure solenoid sets the working pressure that holds the clutches, and the shift pressure solenoid sets how hard each clutch is applied during the change. The last one controls torque converter lockup. Because the module trims those two regulators constantly, a solenoid that responds a little slowly does not always set a code. It shows up first as a soft or late shift that gets worse as the fluid heats up.
This valve body has no line pressure test ports, so a 722.6 is diagnosed with a scan tool and a meter rather than a gauge. Read the transmission module codes, then check solenoid resistance through the round connector on the side of the case. Pull that connector and look inside it: oil wicking through the case connector or along the harness is a known 722.6 problem and will set solenoid codes on good parts. Speed sensor codes point to the conductor plate rather than the solenoids. Our 722.6 shift solenoid guide walks through the resistance test, and the C-Class shift problems guide covers the faults that are specific to the C240 and C320.
The listing covers the 722.6 five-speed in the 2001-2005 C240 2.6L, with the C320, E320 and ML models above in the same catalog range. The 722.6 was built in many variants, and solenoid connectors and housings changed during production, so lay your old solenoids next to the product photo and compare the body shape and connector before you open the box. If you are unsure, send us the year and VIN and we will check it. Owners of earlier E-Class and S-Class models should look at the new 722.6 solenoid set listed for 1994-2005, and every part we carry for this transmission is on the 722.6 and 722.9 parts page.
| Fits | 722.6 2001-2005 |
| Part type | Solenoid Kit |
| Condition | Remanufactured |
| Brand | OEM |
| Reference | C240 |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
The 2001-2005 C240 2.6L, plus the 2001-2004 C320 sedan, 1998-2005 E320 sedan, 1998-2003 ML320 and 2003-2005 ML350 and ML500, all with the 722.6 five-speed automatic.
Six: the three shift solenoids, the modulating pressure and shift pressure regulating solenoids, and the torque converter lockup solenoid.
It can be, but the 722.6 also falls back to second for wiring, connector and conductor plate faults. Read the codes and check the case connector for oil before replacing parts.
If you have speed sensor codes or an oil-soaked connector, yes. The valve body is already out, so it is the cheapest time to do it.
Use ATF meeting the Mercedes approval listed in your owner's manual. MB 236.14 is the current service fluid for this transmission family.
Yes. Clear the stored codes and reset the adaptations so the module relearns shift timing with the new solenoids.
