722.6 Solenoid Kit 1994-05, new and ready to install. Fits the 722.6. Ships fast from the USA.
A Mercedes E320, E430 or S500 from the late 1990s or early 2000s that bangs into gear, slips on the upshift, or goes into its get-home mode and refuses to leave second usually ends up with someone testing the 722.6 solenoids. This is a new set of six replacement solenoids for the 722.6 five-speed automatic, listed for the E320, E420, E430 and E500 and cataloged across the S-Class, CL, CLK, C-Class, ML and G-Class models that used the same transmission. Because it is new rather than rebuilt, every coil, seat and O-ring land in the set starts with zero hours on it.
The 722.6 runs a split system. Three solenoids are simple on-off valves that the control module pulses only during a shift: one handles the 1-2 and 4-5 changes, one the 2-3, and one the 3-4. Two others are proportional regulators. The modulating pressure solenoid sets the base working pressure that keeps the clutches clamped while you drive, and the shift pressure solenoid controls how firmly the next clutch is applied during the change. The sixth solenoid applies the torque converter lockup clutch. The module also uses these regulators to adapt to wear, so a regulator with a sticking valve or weak spring forces the module to compensate until it runs out of range, and that is when the shifts turn harsh or sloppy.
Before ordering, scan the transmission module and write down which solenoid circuit is named. Then measure resistance through the case connector and inspect the connector and harness for oil that has wicked up from the transmission, a common 722.6 fault that sets solenoid codes without a bad solenoid. Keep in mind that the 722.6 valve body wears too: Sonnax and Transmission Digest both describe working pressure regulator bore wear that causes the same flares and soft shifts as a weak solenoid. If a new solenoid set does not change the symptom, that bore is the next suspect. Our 722.6 pressure control solenoid guide explains how to separate the two, and the E-Class 722.6 problems guide covers the faults owners report most.
This set is for the electronic 722.6 five-speed, listed for transmission codes 722.605 and 722.620 through 722.633. The model list on this set starts at 1994, but the five-speed 722.6 arrived in Mercedes cars around the 1996 model year; earlier cars generally used the four-speed 722.3 or 722.4, and this set does not fit those. Check that your transmission is the five-speed before ordering, and compare the connector and body of your old solenoids with the photo. If you send us the year and VIN we will confirm it for you. For the 2001-2005 C240 and related models there is also a remanufactured 722.6 solenoid kit for 2001-2005, and everything else for this transmission is on our 722 parts page.
| Fits | 722.6 1994-05 |
| Part type | Solenoid Kit |
| Condition | New |
| Brand | OEM |
| Reference | E320 |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
Only if it has the electronic five-speed 722.6. Most 1994-1995 Mercedes cars used the four-speed 722.3 or 722.4, which this set does not fit. Send us your VIN if you are unsure.
The set is listed for 722.605 and 722.620 through 722.633, the five-speed units used from about 1996 on.
New. All six solenoids are new replacement parts, not cleaned and retested used units.
A new filter and pan gasket at minimum, and the conductor plate if you have speed sensor codes or oil in the connector.
They will if the cause is a weak regulator or leaking solenoid O-ring. If the flare stays, the working pressure regulator bore in the valve body is the likely cause.
