J M I If I remember correctly the resistance should be 2.5-6.5 ohms. You can check individually if you have them out or through the round plug. You can also apply 12 v to test operation. I found information here: shop.ukrtrans.biz/wp-content/uploads/catalogs/722.6.pdf

Sometimes trans fluid gets into the transmission connector plug...easy to replace ..

Change the transmission oil in the filter

No it's the TCM that needs to have the computer board resolder

Your mechanic may be right but You can try searching your symptom online as it’s possible one of the springs in the valve body is broken, it’s also a common issue. There are kits you can install to tighten that up, they are very inexpensive and worth a try before purchasing a pricey valve body.

What scanner did you use to clear the codes?

Look at the TCM. It must be covered in oil from the O ring 13pin plug. Yes it can go trough the harnes and fill that boi up. If it foesnt work that your cunducter plate is bad

Hey did you fix it

Need other transmission!

How did you fix that no shifting problem.

Del Mytruelement not sure of what you are asking...if you have a whole spare setup then install it complete if you want, the valve body is not “coded” like the newer transmissions and does not need reprogramming.

Wow thank you so much I will be going to pick pull now that’s information that nobody’s given

The 722.9 is a different transmission, from what I know the conductor plate is part of the valve body so an easy repair can no longer be done even though that transmission suffers from the same issue…engineering at its finest. Sorry can’t help.

Check oil coms from wire harness to your electronic part

Same problem boss😭 have you been able to solve it?

Yes, I swapped them back and forth when I was troubleshooting and they plug and play.

What does the transmission do?

You might replace the shift module...which is cheaper and easy job!!!

@@Dima-jq3mj it takes power from the engine and converts it via gears to make the wheels turn efficiently and smoothly.

It’s been years since I did this video. I would check and make sure your tcm matches the transmission you put in. Also if the previous owner messed with the conductor plate then check the plug and pins to make sure that all of that is seated correctly. Otherwise I won’t be able to help in any other way.

Benz-Tech Lou P. Lol this car sat at Mercedes for 3 days and they told me I needed a valve body. And yes, you need a special scanner which I have. Cheers

Sad but not all dealers have quality technicians, sorry that happened. Probably got a new guy that diagnosed your car. :(

I had same problems and more. Dealer wants to charge 300 for general scanning, then another 300 for the transmission issue. I told dealer to F... off!!!

I had the limp mode and a special mechanic wants 1500-2000 to change the conductor/solenoids (I did change the conductor plate). Then I ventured in buying a used shift module! 25 easy minutes and the problem gone!!!

I can help with mercedes diagnosis in the future. Www.cartechconnect.com

Selenoids?

Hunter Mclaughlin always check codes first, it’s easy, there are a lot of videos on the subject. Even a cheap reader from a parts store will be better than nothing.

You need a scan tool to access the transmission computer and reset it afterwards you should be good after that

If a true limp mode was trigger by the TCM, a reset and clearing of all TCM DTC codes is needed. The other solution to the limp mode is, after the fix, is to change the TCM. This will only work on NAG 1 5 speed. NAG 2 7 speed is a completely different headache.

its by the gear shifter called "W S"

u need to buy a obd2 scanner and reset the tcm look up more videos youll see

my cars in limp mode hopefully after i reset it and change plate its fixed

Ta Oh solenoids are mounted on the valve body along with the conductor plate.

Luke C ok Thanks I only change the plug on the transmission, does the conductor plate, easy to remove ?

Ta Oh you have to remove transmission pan and then the valve body

DaRealist One the can of soda might have fried your shift module, it’s a different issue. Google Mercedes shift module.

How do you know that you don't have any codes? What diagnostic tool did you use to determine that?

Thanks! Shift module was the issue....I replaced it myself

Same thing, I spilled coffee and it went into limp mode. I replaced the conductor plate - no help. Lived with it for 2 years then I changed the shift module. It works perfectly then!!!

You need shifter

You can buy my 2095 c230k!!

@@ericthompson4644 Scotty Kilmer was right ! Toyota is the best ! No disrespect.

AmZ yes, checked the voltage and resistance and they were within spec. I also reinstalled the old solenoids with a new conductor plate and problem persisted. It’s not until I changed the solenoids with the junkyard ones that the problem went away.

Duh...

@@lukec4745 super fix. After putting in the new plate is all fine? Also which brand 134 oil did you use? Did you drain the torque converter oil too? Total drain should be 7.25 liters.

Any updates on this ? How’d you fix it ?

@@swishmar0308 sold the car to my neighbour.

Adem C I’m having my friend for dinner

He does has similar accent as well

Lmao! First thing I thought. 😂.

Yes my dear

I have a 2004 CL500 Mercedes-Benz in limp mode can you help me fix it I have changed the vgs conductor plate and still in limp mode should I changed the valve body or I need some insight from someone please

Jon Randall scan it first. Also check the TCM module under the passenger footrest for transmission fluid contamination. If there is fluid in the connectors you can try cleaning the harness and installing a new connector on the transmission, cheap fix. Google 722.6 transmission connector.

Hi Luke. Thanks for your reply. The scan reveals code P0715 ( Input / Turbine Speed Sensor A circuit ). This input speed sensor is built into the Trans. Conductor Plate which I have just replaced with the OE German Conductor Plate. I, of course, replaced the Connector too, and noted that the wiring had trans. fluid on the harness. This lead me into the passenger foot kick panel, and I removed the Trans. Control module, which had small fluid on the wiring going into the connections, and into the TCM itself. I opened the TCM carefully, and other than a little bit of fluid inside near the connectors, it appeared in good shape. My car is stuck in first or second gear, and won't shift into other gears. I can reach 30 or 35 but the tach is at 4500 approx. I am not sure if this is "Limp Mode" or not. I am guessing that I need to have my TCM rebuilt or replaced, or Conductor Plate solenoids are actually bad. However, one parts place thinks maybe the Input Speed Sensor Code P0715 is in German terms ( = shift micro switch ), which in English is Neutral Safety Switch.

Jon Randall did you resolve this issue?

@Steve Johnson I did have the same scan code, but I just replaced the shift module and it works right away. Good lucks. Shift module normally do not last long since ppl spilled liquid and the heat...etc.

Recently my transmission did not go OVERDRIVE (waste of momentum/gas) then the vacuum hose to brake booster broken, I replaced it and also replace a big vacuum hose which is hardened by heat and was loose. Now transmission runs good!!!

Ant Be mobbin I can’t comment unless we have somewhere to start with...some background is needed, there can be a few reasons for this. Get it scanned first, with a descent scanner so you can get all the codes not just generic ones. Make sure your battery is fully charged.

Hey Luke, when you have that limp mode problem, did the fuse #55 burn out? I got the same year and model you have, with no crank no start problem.

JT 1200 eBay $65usd

Rey Bolor I tried 2 conductor plates.

hey does the car make a whinining nosise when you drive it if the conductor plate is bad. My e320 whines then goes out of gear.

O Dogg I had no whining noise. That could mean something mechanical.

I changed fluid, filter, gasket and harness connector..problem solved

@@odogg4447 Whining mean low fluid level. You didn't have enough transmission fluid in it.

No. Not on the 722.6

@@lukec4745 so 722.9 needs programming

Is the check engine on? And how do you know that is stuck in 1st gear? What tool or scanner did you use to come to that conclusion?

Dimitriy Perchik I have a GL450 and I’ve got the 722.9 transmission. I know it’s in first because of the speed and rpms that it will top out at. I’m pretty sure it’s my conductor plate that’s bad. More specifically the speed sensor. Could be a solenoid issue as well. From all of the info I’ve been reading I can’t just buy one or go to s junk yard for one I can only get mine refurbished. Unless I want to spend the THOUSANDS at the “stealership”.

Dimitriy Perchik and yes check engine is on. And the error code it’s giving me is pointing the speed sensor. Thanks

@@laenaszone What is the top speed you can do with limp mode on? If you have tried to drive it like that... If you had a scanner simular to Icarsoft MB 2 or Icarsoft MB V2, you could go in the TCM and clear the code for the limp mode and drive it until the limp will comes back. My understanding with these transmissions is, base on my experience with them, if you are able to clear the codes and drive for a little while, it means that the problem is more likely electric, but if you try to clear the codes and they don't clear or do anything, and you are not able to drive after clearing/resetting, it means that the problem is more likely mechanical. For example, a solenoid can get the right voltage and have the right resistance, but if it doesn't open and close (mechanical process) when needed, your transmission will not operate properly. You are right about NAG 2 7 speed transmission. The TCM is part of the conductors plate and it does require SCN (Security Code Number) coding with the immobilizer, just like the ignition switch, key, steering lock and instrument cluster. The cheapest option for you is to fix/refurbish the original that you have. You can buy a used one, IF you can find someone to make the conductors plate virgin and after personalize (SCN Coding) it to your vehicle. The Chinese copy of AVDI, the FVDI system is able to make the plate virgin, but to personalize it to your vehicle, it will require a DAS Xentry diagnostic system or Vediamo, or Autell system that can do SCN coding, or AVDI.

laenaszone are you sure it’s first gear?

Robert Jace yes.

Luke C yeah my dad's car does not get out of I guess first or second gear and you cannot switch to 3rd or 2nd on the shifter

@@Robert-bg1og Conductor plate

@@darktiger6518 eventually I found out it was the shifter I change the gear shift and everything was perfect

@@darktiger6518 but I first change the conductor plate and it did nothing.

Transmission Control Module - TCM

Why would you need a rebuilt valve body? It’s expensive. If you watch the video I think I mention I bought the rebuilt/shift kit for it, quite simple to change those springs. None of mine were broken but since I bought the kit I replaced them anyway. Wasn’t the problem.

@@lukec4745 Sounds like we had different issues. I had a very difficult time with a 1997 280c that was stuck in 1st gear. Your video was very encouraging. In the end, I went with a rebuilt valve body by Sonnax. I believe it had all the solenoids on the part for around $450-500 with a 1year warrentee. A bit expensive, but it did the job.

Nope. New solenoids

transmission job costs the same as the used car...lol...

Johnathan Waters well if you can’t offer the solution then what is the sense of commenting. The car went to Mercedes after I put in the new conductor plate because I was told I need a “special” computer to reset the tcm. That is nonsense, the tcm will reset itself when the issue is resolved. The only transmissions that need the tcm flash are the newer 722.9.

@@lukec4745 Well, this is what I do for a living, and I believe I did offer the solution. Not sure what you're talking about.

@@lukec4745 First off thank you! ..Like to say Your thinking and way you explain things I can relate too and your camera shots were more than helpful..I have a 06 c230 and I believe I need to change my plug ..also I dont have a dipstick tube with a lock everyone keeps mentioning...stuck hours away with lil ones :(

Your loss. These cars are gems.

He isn't having pain.. lol

Buy Toyota than... Less pain.

@@Jkstolz German engineering is overrated.

@@Dima-jq3mj I agree. But if you buy used/cheap ones and have ability to fix then they are OK!!!

Hey buddy what do you mean by reset the battery or computer?

@@deequan-nu5fy i heard an old battery can cause it. changed the battery then put a scanner over it and reset the codes using the scanner tool. changed all oil and filters, have not had a problems since

Laying indeed 👌👌

Dimitriy Perchik you are incorrect. A malfunctioning solenoid or anything else will put the transmission into hard limp. On the 722.6 once the problem is resolved there is no need to reset anything. Trust me. As for doing a live scan, I did, while driving, it showed me solenoid voltages as well as told me that my shifter module or speed sensor is not at fault because it was reading correctly.

@@modernblinds7801 There is no such thing as a hard limp mode. The "Limp - Home Mode" is a preset operating condition of the ECM or TCM. Once is trigger, it must be reset. In simple words or to use a computer terminology, LHM mode is like a safe mode on a computer, limited operation. I stand by what I said, knowing by experience, a true TCM LHM mode must be reset in order to be able to operate the vehicle.

Dimitriy Perchik I disagree, this is not the first European vehicle I worked on and certainly not the first Mercedes. The scanner read limp condition, vehicle was locked into 2nd gear, once the problem with the solenoid was resolved nothing had to be cleared, vehicle started operating normally.

@@modernblinds7801 First of all, the transmission possible was stuck in 2nd gear due to a bad solenoid that was not letting the transmission shift any higher and not due to a LHM. Which solenoid was changed? mega.nz/#!BrIFQS4Y!fdmqR58bDGxgktuHQlKwDS2nPTQ9yuSWRTCN18x9Ars Can you tell me from the link above which solenoid was changed? I myself had a situation where I changed the transmission fluid on a 2008 Mercedes Sprinter 3.0 turbo diesel and I used an aftermarket filter that after about 20,000 miles dropped out of the valve body and it was not letting the transmission shift passed 2nd gear. The transmission was not in limp mode. I simply changed the filter with new fluid and didn't have to reset anything, but prior to that I had to change the conductor's plate due to bad speed sensors (input and output) and a reset was needed. You don't have to agree with me. If you ever have a problem with bad transmission speed sensors, which will put you in a true LHM, and you will have to replace the conductor's plate, then you will understand what true LHM is. You will not be able to fix the issue by simply replacing the conductor's plate. You will have to have a scanner that is capable of going into the TCM and reset it. Why don't you try to reset a limp mode on a diesel engine due to running it out of DEF, for example, by simply filling the vehicle with DEF since it was out of it? I would love to see you try... And I hope you know and understand that there are two different types of limp modes, engine and transmission. Like I said, try to reset the 5mph limitation (LHM) on a diesel engine, due to running the vehicle out of DEF, by simply filling it with DEF. I would really love to see you try.... 😀

Dimitriy Perchik you are talking about two different modules. I can’t comment on running out of def because my diesel Jeep doesn’t use it. The transmission was in limp mode, 2nd gear start and hard gear engagement. I’ve changed many 722.6 conductor plates on jeeps and Mercedes vehicles without the need to reset anything and yes my scanner can reset the individual modules if needed. This video is meant to help people and give them another area to consider when the conductor plate does not resolve the issue, not to confuse them even more. The car was in limp mode, conductor plate was changed, codes were reset and the car never came out of limp. At that point it was taken to a Mercedes dealership for diagnosis. Diagnosis came back with a bad conductor plate. When told it was changed the Mercedes technician said it will then likely require the valve body, which I did not agree with. I then took it back and started troubleshooting it myself. Although all the solenoids tested ok on both resistance and when 12v was applied, one was faulty. Good luck!

Lol that’s no better