Need to replace the Transmission Valve Body Conductor Plate on your Mercedes-Benz? By following the procedures below, you will learn how to replace the transmission valve body conductor in place of your Mercedes-Benz.
This guide will provide step-by-step instructions on changing the conductor plate (and valve body) on 722.6 transmissions installed on most 1998-2007 Mercedes-Benz vehicles, including C-Class, E-Class, S-Class, CLS-Class, R-Class, ML-Class, G-Class, etc.
What you will need
- 722.6 conductor plate
- Part numbers: 1402701161 1402700861 1402700761 1402700561
- 13-pin 722.6 plug
- Part Number:2035400253
- Oil pan gasket for 722.6
- Transmission oil filter 722.6
- Transmission oil MB ATF 134
- 4 liters – partial flush
- 12 litters – total capacity
- Oil drain plug washer
- Typically included with the filter and gasket kit.
- Mechanic toolset
- Torque wrench
- Transmission dipstick
- Lift, rams and jack stands
- 5mm Allen Key or Torx Socket Set
Instructions on how to change the conductor plate and valve body on Mercedes-Benz 722.6 5G transmission.
- Allow the car to cool down. Raise your car using a car lift, ramps, or jack stands.
- Secure the vehicle with jack stands. Set parking brakes. Block rear wheels to prevent the vehicle from rolling back.
- Remove the splash shield from under the vehicle. They are held in place with several 8mm screws.
- Place an oil pan under the transmission. Locate the drain plug at the bottom of the transmission pan and remove it using a 5mm Allen Socket and drain all transmission oil. Reinstall the drain plug using a new washer.
- Remove the Allen or T30 Torx bolts that hold the transmission pan in place, but keep track of the position of every bolt as they are not all the same length.Lower the pan carefully, as there will be some oil left in it.
- Remove the oil filter by pulling it downwards. When it comes out, a small amount of oil will splash out of the valve body.
- Locate the plug connector from the transmission. Turn the bayonet lock counterclockwise and pull the plug out. Locate and remove the bolt found in the center using a deep 7mm socket, and wiggle the connector out.
- Locate and remove the T30 Torx bolts that hold the valve body and conductor plate assembly in place. Do this in a zig-zag pattern. Lower the valve body assembly from the car.
- Working on a clean table or workbench, remove the yellow plastic covers at the top side of the conductor plate. Underneath it, there are six solenoids held in place by three brackets. Remove the T30 Torx bolts and pull out the solenoids carefully.
- The connector plate is held in place with plastic tabs. Pull it up until it breaks free, remove it from the valve body, and install a new connector plate similarly.
- When reinstalling solenoids, make sure to place them in their original locations. Reinstall the brackets and place the plastic covers back on.
- When raising the valve body assembly back into the gearbox, ensure that the gear selector lever fits into the sliding tab on the side of the body. If you skip this step, the vehicle will not drive when placed in Reverse or Drive.
- Smear a small amount of transmission oil on the o-ring of the new filter and push it into the hole in the valve body until it pops into place.
- Replace oil pan gasket.
- Clean the transmission pan very carefully. Avoid leaving any debris or lint in the oil pan. There is a magnet at the front side, which you will need to remove and clean away any metal shavings from it before reinstalling.
- Reinstall all transmission pan bolts. Take extra care when starting bolts, as they can cross-thread easily. At the first stage, hand-tighten them until snug in a criss-cross pattern. Then tighten them up to 8Nm with a torque wrench again in a criss-cross pattern.
- Under the hood, locate the transmission dipstick tube—brake off the red clip. Remove the plug and place a suitable funnel into it. Pour in 3.5 liters of transmission oil and then put the dipstick in.
- Start the car and let it idle for 5 minutes. Drive it for another 5 minutes. During this time, shift it through the gears several times to make the oil move inside the transmission.
- Back under the hood, pull out the transmission dipstick to check the oil level, and add more if needed.
Ultimately, all error codes need to be cleared and recalibrate the transmission with a YOUCANIC Full System Scanner as this ensures the best performance. This can be done by a Mercedes-specific diagnostic tool or by taking it to a dealer or Mercedes specialist.
The Mercedes five-speed automatic called the Mercedes-Benz 5G-Tronic, also known as 722.6, is their first electronically controlled transmission. If your car is from that time, it most likely has a five-speed auto transmission. Although robust and reliable in general, this transmission has some weak points. One is a faulty conductor plate. Another is leaking the 13-pin connector. In this guide, we will be explaining exactly how to fix the issue(s).
- 722.6 transmission pan bolts should be torqued to 8 Nm (71in. lbs.)
- 722.6 transmission drain plug torqued to 20 Nm (15 in. lbs).
- 1996–1998 Mercedes-Benz W140
- 1999–2005 Mercedes-Benz W220
- 2006–2013 Mercedes-Benz W221 (V12 models only)
- 1996–1998 Mercedes-Benz C140
- 2000–2006 Mercedes-Benz C215
- 2007–2014 Mercedes-Benz C216 (V12 Models only)
- 1996–2002 Mercedes-Benz W210 (all models except some early 1996 cars)
- 2002–2006 Mercedes-Benz W211 (all models except 2004-2005 E500)
- 2007–2009 Mercedes-Benz W211 (4-cyl and 4-Matic only)
- 2009–2011 Mercedes-Benz W212 (4-cyl models only)
- 1997–2000 Mercedes-Benz W202
- 2001–2005 Mercedes-Benz W203 (all models)
- 2006–2007 Mercedes-Benz W203 (4-cyl and 4-Matic models only)
- 2007–2011 Mercedes-Benz W204 (4-cyl models only)
- 1998–2002 Mercedes-Benz W208
- 2003–2005 Mercedes-Benz W209 (all models except 2005 CLK 500)
- 2006–2009 Mercedes-Benz W209 (4-cyl and CLK 55AMG only)
- 1998-2005 Mercedes-Benz W163
- 1996–2006 Mercedes-Benz W463 (all models)
- 2007–2012 Mercedes-Benz W463 (G55 AMG only)
- 1997-2003 Mercedes-Benz R170
- 2004-2010 Mercedes-Benz R171 (4-cyl models only)
- 1997-2001 Mercedes-Benz R129
- 2001–2004 Mercedes-Benz R230 (all models)
- 2005–2006 Mercedes-Benz R230 (all models except SL500)
- 2007–2011 Mercedes-Benz R230 (SL 55AMG and V12 models only)
- 2005-2009 Mercedes-Benz W199
- 2002–2013 Maybach 57 and 62
- 2002-2012 Jeep Grand Cherokee (02-04 WG Diesel W5J400, 05-10 WK V6, WK V8, WH V6 3.0 Diesel export only Steyr W5A580)
- 2006-2010 Jeep Commander XK (3.7 gas) XH (3.0 diesel – export)
- 2012-2018 Jeep Wrangler (JK)
- 2005-2008 Dodge Magnum (AWD, RT, SRT8 only)
- 2006-Present Dodge Charger (2006-2007 3.5L V6 HO) (2015+ Police Only)
- 2007-2011 Dodge Nitro (4.0L Models only)
- 2009-2014 Dodge Challenger
- 2011-2012 Dodge Durango (V6 Models only)
- 2003-2006 Dodge Sprinter Vans ( N. America)
- 2004-2008 Chrysler Crossfire, all models
- 2005-2014 Chrysler 300
- 1998-2003 Jaguar X308 (Supercharged models only)
- 1998-2002 Jaguar XK (X100) (Supercharged models only)
- 1998–2014 Ssangyong Chairman H
- 2004–2017 Ssangyong Rexton
- 2005–2017 Ssangyong Rodius
- 2006–Present Ssangyong Kyron
- 2014-Present Ssangyong Actyon sports
- 2002-2005 Porsche 911 (996 series)
- 2006-2008 Porsche 911 (997 series)
- 2001-2007 Freightliner Sprinter Vans (USA)
Frequently Asked Questions
Do you have to program the conductor plate on 722.6 transmissions?
The new conductor plate comes pre-programmed and ready for fitment. 722.6 does not need coding in most cases. However, you must still clear the codes and run a calibration procedure to ensure the best results. This can be done by an MB-specific diagnostic tool, or you can take it to a dealer or a Mercedes specialist.
What are some symptoms of a bad conductor plate or valve body?
Downshifts taking more time than usual
Transmission going into Limp mode
Staying in second gear all the time
We hope you find the Mercedes 722.6 5G Transmission Valve Body Conductor Plate Replacement guide helpful. Check these troubleshooting and repair guides for more help on your Mercedes-Benz.
I am a owner of a GL 350 164 class mercedes and do most of the repairs myself depending on their complexity. Thank you for taking the time to post your instructions for repairs.
Some work l have done my suv are changing, front and rear airmatic suspension and struts, power supply lead for front brake wear sensor because l found it was broken at a bending point.
Your torque setting were very helpful when checking a strange noise from my front left lower to mid section of my vehicle front suspension. Everything was checked by mercedes but couldn’t find a problem but suspected the aftermarket airmatic struts. I suspect the sway bar bushing although they look good.
Thanks again for your posts.