Complete 722.6 valve body with shift solenoids fitted, for Mercedes C-Class, CLK and ML five-speed automatics stuck in limp home.
This is a complete 722.6 valve body with the shift solenoids already fitted, built to replace Mercedes-Benz part number 2112770101 on the five-speed 722.6 automatic, also sold as the W5A580 and badged NAG1 on Chrysler-family applications. Listed fitment is C230, C240, C280, C320, C350, CL55, CL65, CLK320, CLK430, CLK500, CLK55 and ML55 for model years 1995 through 2006. Check the transmission tag before ordering, since the later 722.9 seven-speed uses an entirely different body and does not interchange with this part.
The 722.6 goes to the bench for two separate reasons, and they call for two different repairs. The first is the conductor plate and its integrated speed sensors going open, which drops the car into limp home and leaves it stuck in second gear with no downshifts available. The second is bore wear inside the aluminum valve body casting itself, which shows up as a 2-3 flare, delayed engagement into drive once the fluid is hot, or a shudder when the torque converter locks up. New solenoids alone will not fix a worn bore, which is why this listing replaces the complete valve body with solenoids already installed rather than selling solenoids on their own.
If the car is stuck in second with no downshifts, start with the conductor plate connector rather than assuming the valve body itself is bad. Our 722.6 input/output speed sensor symptoms guide walks through isolating a connector or sensor fault from a hydraulic one, and our 722.6 shift solenoid symptoms and replacement guide covers the flare and shudder complaints tied to solenoid wear specifically.
Fitment on this assembly is C230, C240, C280, C320, C350, CL55, CL65, CLK320, CLK430, CLK500, CLK55 and ML55, model years 1995 through 2006, replacing part number 2112770101. Confirm the pin count on your conductor plate connector against the listing photos, since mid-run connector changes exist within this span, or send your VIN to confirm fitment before ordering. The 722.6/722.9 transmission parts collection carries the later 722.6 and 722.9 revisions for vehicles outside this 1995-2006 window.
Drop the pan and filter, unclip the 13-pin conductor plate connector, and back out the valve body mounting bolts. The manual valve rides on the detent lever pin, so lower the body straight down and off the pin rather than prying it sideways, which can bend the pin or score the bore. Torque the bolts down evenly in a spiral pattern from the center out, refill with MB-approved 236.14 or 236.15 ATF, and check the level at operating temperature through the fill plug. Reset the transmission adaptation values with a scan tool afterward, since a 722.6 left on the old adapts will shift hard for the first few hundred miles. A NAG1 conductor plate with speed sensor is worth replacing at the same time if the limp-home complaint came back after a prior repair, and a 722.6 TCC solenoid is worth checking separately if the shudder persists after this valve body is installed.
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Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
Listed fitment is C230, C240, C280, C320, C350, CL55, CL65, CLK320, CLK430, CLK500, CLK55 and ML55, model years 1995-2006, replacing MB part number 2112770101. The 722.9 seven-speed does not interchange.
Solenoids fix an electrical or control fault, but bore wear inside the aluminum casting is a mechanical problem that new solenoids alone cannot correct. This assembly replaces both at once.
That symptom is classic limp home from either a conductor plate connector fault or a worn valve body. Check the conductor plate connector first using our speed sensor symptoms guide before assuming the valve body is the cause.
MB-approved 236.14 or 236.15 ATF, checked at operating temperature through the fill plug rather than a dipstick.
Yes. Reset the transmission adaptation values afterward, or the transmission will shift hard for the first few hundred miles on the old adapts.
This is a new replacement assembly with solenoids installed, backed by a 1-year warranty.
