[EN] Mercedes 722.6 Automatic Transmission conductor plate inspection and replacement.

In this video, we replace the transmission oil service kit and the conductor plate on a Mercedes CLK.
The electronically-shifted, five-speed automatic transmission Mercedes 722.6 has been used by many different vehicle manufacturers including Mercedes-Benz, Chrysler, Jaguar, Jeep, Dodge and SsangYong.
The hydraulic and electronic control of this transmission is achieved by the six solenoids connected to the conductor plate, which is attached to the valve body inside the transmission.
The conductor plate also carries out the electrical sensing and control for the internals of the transmission; providing input shaft speed, indication of the ‘Park’ and ‘Neutral’ positions to inhibit the starting of the vehicle with a gear engaged, and the sensors for the oil temperature and level.
However, the conductor plate and the electrical plug connector to the wiring harness can be problematic - causing issues that result in the vehicle entering ‘failsafe’ mode and logging fault codes relating to the sensors and/or solenoids valves.

[@TheChemistDIY]

I have a 2004 W203 Kompressor Sport Sedan with a few problems related to shifting. Ive owned the vehicle since 30k miles and it currently has 240k miles. Ive never had the transmission serviced. It was a Certified Used purchase from Mercedes. There have never been any error codes thrown related to the transmission since ive owned but i had the following issues for a about 2years now which have progressively gotten worse. 1. The automatic downshift at times, from 2nd to 1st gear (at slow speeds) slams into gear causing a big jerking. Other times it perfectly fine. On the freeway this causes this causes the RPMs in first to drop really low when almost coming to a complete stop in traffic. 2. 1st to 2nd gear on take off (slow speed). I can feel a jutter in each gear causing a lurching or springing takeoff affect as the car speed increases. It becomes a less or lighter feeling in the other gears. This doesn't happen if im hard on the acceleration or if Im manual shifting. In fact all shifting in manual shifting are fine, that i can tell. Also, but infrequently, the car will lurch or lung forward at a complete stop without warning. 3. While at freeway speeds between 60-80 mph and letting off gas to coast. There is a jerking or lurching feeling. If i had to describe it simplistically, it feels like a tight spot in a chain, where the chain rotates fine to the point of the tight spot or kink and slowes the rotation with a sudden small sputter or light jurk (wobble), and then repeats the cycle untill you get back on the gas. This wobble feeling also has me thinking driveshaft unbalancing, knuckle or driveshaft bearing. 4. At times the shifting doesn't feel like its fully engaging. By engaging I mean if this were a manual shift, that contact point where the clutch engages the flywheel and you get a positive contact confirmation of locking into place. Im not sure if fluid & filter servicing would fix this issue, may be the fluid level is low, or if this could be a solenoid.. so many ways to go with this . Id like to get your thoughts.. Here a good read about other having the same mbworld.org/forums/c32-amg-c55-amg-w203/531557-jerk-transmission-problem-solved-9.html

[@philberry9956]

Never forget to check 13 pin harness plug,not just adaptor plug ,pins are not soldered only crimped in place and intermittently one or more come loose, then limp mode happens, wires can make contact again with limp mode happening later, very very hard problem to find

[@febi.bilstein]

👍

[@alechill5987]

What happens if the shifter doesn’t shift? Or read gears on the vehicle low fluid or bad shifter or bad connection

[@mattizmushroom1466]

how long does this take to do yourself?

[@williamb454]

Mine trans was acting erratic 98 MBZ c43 amg, unplugged battery overnight, no cel and shifts normal

[@worldwidesports4k]

Hello do the p0715 code go away after the conductor plate is change on 722.6 are do i need a mercedes scanner thanks.

[@febi.bilstein]

Thank you for watching our video. If the transmission fault has been fixed by replacing the faulty parts, then it is best practice to check and clear any fault codes. In this case you should not require an official Mercedes-Benz diagnostic tool to do this, a good quality aftermarket tool should be able to do this task.

[@worldwidesports4k]

Thank you ​@@febi.bilstein

[@alexandruursu3460]

@febi.bilstein Hello! Can you please provide a tightening torque spec for conductor plate connector retaining bolt ? Thank you for the great video !

[@febi.bilstein]

Thank you for watching our video. The conductor plate clips to the valve body, then the valve body bolts require to be tightened to 8Nm.

[@ludataunatusz]

Do i have to check te oil level at idling motor, or i have to stop te engine?

[@febi.bilstein]

Thank you for watch our video. The oil is checked while the engine is idling.

[@keefsnow]

What should the dipstick read?

[@febi.bilstein]

Thank you for watch our video. The dipstick has a high and low level indicator marks to gauge the level of the oil.

[@shckltnebay]

Doesnt a new conductor plate require coding to the vehicle?

[@febi.bilstein]

Thank you for watching our video. No coding or basic settings are required in this application.

[@shckltnebay]

@@febi.bilstein I'm thinking of the 722.9

[@johannesmolokoane9438]

The machine reads no communication with the gear box ,what could be wrong ( Benz c 200 )

[@shckltnebay]

@@johannesmolokoane9438 Sounds like a conductor plate fault, what year transmission?

[@sbshahin]

not if you repair only the component responsible for the fault on it. however if you decide to replace TCU, you ll need to transfer data from your old tcu

[@hamodi9050]

Nice 🌹🌹👍

[@febi.bilstein]

Thank you for watching our video and your positive comments. 👍

[@FADI_Italy]

Hello.... thank you for the useful video, butvI got a question, I replaced my car Transmission Conductor Plate NAG1 for 2007 Chrysler 300C 5.7l AWD, it works then not shifting, they told me your Transmission need programming to work correct, someone else told me it doesn't need programming, so I got confused does it need Programming as you a professional??? Cuz am afraid to pay money for programming then if it doesn't work then you waste the money for nothing. Thank you

[@febi.bilstein]

Thank you for watching our video. There appears to be no programming required for this part. However, there are a resetting of parameters as a software option on the diagnostic software. This would not cause the condition you are describing.

[@thetruth5305]

Just had my conducter plate fixed on my w211 e63 amg 😢in uk gears were jamming not cheap is this correct?

[@FashionShop-l3r]

Could I use 33889 Atf for w203 c230 kompressor

[@febi.bilstein]

Thank you for watching our video. If your vehicle is equipped with a 722.6 automatic transmission, then please use febi part 29449 not 33889. For our full applications for your vehicle please visit our on-line catalogue www. partsfinder.bilsteingroup.com

[@rgabran]

The diagnistic computer says "Slip" . There is big delay in shift between 1st & second shift.

[@haideralifarooq]

Hey, I have the same issue after changing the conductor plate twice. Computer says transmission is slipping and there is a big delay between 1 and 2 gear. Please let me know if you find any answers? Thanks

[@mohamedazkoul9544]

Valve body ...I had the same issue in the same transmassion

[@milkywayandbeyond]

What did you end up doing?

[@milkywayandbeyond]

@@haideralifarooq What did you end up doing?

[@paulbeardjr4999]

I have a great running engine but the transmission stops upshift

[@Secretsanta182]

Does it get stuck in gear?