Transmission Problem - Conductor plate - Mercedes-Benz Forum

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post #1 of 15 (permalink) Old 10-20-2009, 10:01 AM Thread Starter
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Transmission Problem - Conductor plate

I posted a brief on this in the G section, but since the trans is universal among many many models, I wanted to seek a wider audience..

Hey guys, my new (to me) 02 g500 gave me an acceleration problem the other day. It took about 1 minute to make it to 45mph. It didn't throw any fault codes or give me any other problems for a 300 mile interstate ride home. Upon arrival, at slow speeds it did it again and threw a Throttle Position Sensor code... Then a window fell.

I went to the local dealership today to order a tps and have them install a bad window regulator. After about an hour and 800 dollars, they informed me that I have a transmission problem. I told them I already knew about the TPS and I would be installing it myself. The service manager insisted I had a trans problem that was unrelated. Knowing that dealers are pretty unfamiliar with this car, I didnt argue and I told them I would get back to them after I installed the sensor and let them know.

Then, on my ride home I went to get on the longest bridge in the world (25 miles with no shoulder in rush hour traffic)- lake pontchartrain causeway. The G accelerated to 25 mph and refused to up shift... It was turning 5k rpms just to move slowly. I tried knocking it up a gear and it refused. I tried turning it off in neutral, then back on, then shifting in D.. still wouldnt shift. After 5 miles, I made it to the crossover and parked it. I let the tranny cool for 10 minutes and turned the other way (no traffic) to get back to the main land. As soon as I did this, it drove fine. I made another U turn and came home with no issues.

The dealer gave me this information today- the code is p2122 fault: The CAN signal from control module N15/3 (ETC[EGS] control unit) is faulty.

This is my quote:
140-270-08-61 Electrics 231.65
140-991-00-55 Lock Pin 2.50
140-271-00-80 Elastomeri 37.80
140-271-00-60 Seal Ring 2.50
001-989-68-03-10 Transmissi 105.00
140-277-00-95 Oil Filter 36.90
203-540-00-53 Pilot Bushing 19.50

Total 473.98 + labor quote = 1100 FREAKING DOLLARS, HELP!
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post #2 of 15 (permalink) Old 10-21-2009, 07:15 PM
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With that code there might be more of a problem with the Transmission module (located under the center console)--a lot of times you can get trans fluid sucked up through the harness and into the module which can cause problems. you might have a problem with the conductor plate that they told you about but you have to have someone check the module for the fluid damage **that code with the CAN signal that means the transmission module is not sending info out to the other modules**
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post #3 of 15 (permalink) Old 10-21-2009, 07:40 PM Thread Starter
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Hmm, this is scary. I thought my troubles were healed. How does transmission fluid make it UP these wires? What the heck do they use for wire insulation?

Ill post back, ordered all the parts for a conductor plate replacement.
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post #4 of 15 (permalink) Old 10-22-2009, 05:23 AM
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the conductor plate actually can leak so your gonna need to do that anyways. when that happens the electrial current will actually draw the fluid through the harness..
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post #5 of 15 (permalink) Old 10-22-2009, 12:18 PM Thread Starter
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Thanks for the help guys,

Ok, just went to a local Mb Indy shop... They say this is extremely common and even showed me a box full of the new gaskets. This guy was tellig me that the conductor plate has no reason to be replaced and 1100 was way too much.

He explained the same problem of fluid wicking up and if it is in it's infancy it would be a 300 dollar repair to replace gasket an if it is in the etc already maybe 500 dollars. He has all Mb diagnostic eq and star..

Does anyone see any reason he would be wrong? Why would the conductor need to be replaced anyway if the problem is a gasket leaking and fluid shorting out electronics?
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post #6 of 15 (permalink) Old 10-22-2009, 12:32 PM
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Do you have the 722.6xx five-speed Gtronic transmission in your G?
(You can run your VIN against the Russian site to find out if you don't know.)

If so then may I suggest you read the excellent information compiled in the W210 forum? Including how to change the conductor plate if you need to.

The leak is actually from the connector outside the trans, which usually seals pretty well to the outside (unfortunately) and then forces fluid up the harness to the TCU. The conductor plates can and do fail, but the first step is to fix the leak at the connector. That's all external, the codes can be cleared, if the problem returns then the plate is worth another look.

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post #7 of 15 (permalink) Old 10-22-2009, 12:37 PM Thread Starter
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Yessir, same transmission as the 210. Thanks for the reply, I will check it out when I get to a computer. Navigating by telephone is an excercise in futility

Thanks again
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post #8 of 15 (permalink) Old 09-17-2011, 05:47 PM
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E350 faulty conductor plate

I had a remarkably similar experience with my 2006 E350 a couple of days ago. I had to brake hard to avoid a guy who cut me off in front on the freeway. After I let go off the brakes and tried to accelerate, the car won't accelerate well. Luckily, the freeway was a bit congested and I was near the exit I was going to take. Up until parking at my work about 5 minutes later, the accelerator didn't respond well. I turned the engine off and checked again after a few hours. It responded fine.

Suspecting something is wrong/intermittent, I took the car to the dealer, and they ran the diagnostics. They said they "found conductor plate faulty" and "found code (Internal speed Sensor is not available)". They said they need to replace conductor plate. Strangely, the quote for it was $1100, same as what was mentioned below! I declined it to talk to Mercedes Customer Hotline first to see if I could convince them that this is a safety issue and they should fix it. The dealer said what they would replace is the transmission electronic control module. Didn't quite understand what a conductor plate is, and why that meant control module! If anyone could shed some light, I would be very grateful. Thank you.

Venkat


Quote:
Originally Posted by NOLA911 View Post
I posted a brief on this in the G section, but since the trans is universal among many many models, I wanted to seek a wider audience..

Hey guys, my new (to me) 02 g500 gave me an acceleration problem the other day. It took about 1 minute to make it to 45mph. It didn't throw any fault codes or give me any other problems for a 300 mile interstate ride home. Upon arrival, at slow speeds it did it again and threw a Throttle Position Sensor code... Then a window fell.

I went to the local dealership today to order a tps and have them install a bad window regulator. After about an hour and 800 dollars, they informed me that I have a transmission problem. I told them I already knew about the TPS and I would be installing it myself. The service manager insisted I had a trans problem that was unrelated. Knowing that dealers are pretty unfamiliar with this car, I didnt argue and I told them I would get back to them after I installed the sensor and let them know.

Then, on my ride home I went to get on the longest bridge in the world (25 miles with no shoulder in rush hour traffic)- lake pontchartrain causeway. The G accelerated to 25 mph and refused to up shift... It was turning 5k rpms just to move slowly. I tried knocking it up a gear and it refused. I tried turning it off in neutral, then back on, then shifting in D.. still wouldnt shift. After 5 miles, I made it to the crossover and parked it. I let the tranny cool for 10 minutes and turned the other way (no traffic) to get back to the main land. As soon as I did this, it drove fine. I made another U turn and came home with no issues.

The dealer gave me this information today- the code is p2122 fault: The CAN signal from control module N15/3 (ETC[EGS] control unit) is faulty.

This is my quote:
140-270-08-61 Electrics 231.65
140-991-00-55 Lock Pin 2.50
140-271-00-80 Elastomeri 37.80
140-271-00-60 Seal Ring 2.50
001-989-68-03-10 Transmissi 105.00
140-277-00-95 Oil Filter 36.90
203-540-00-53 Pilot Bushing 19.50

Total 473.98 + labor quote = 1100 FREAKING DOLLARS, HELP!
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post #9 of 15 (permalink) Old 09-17-2011, 08:39 PM
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Quote:
Originally Posted by vraosat View Post
I had a remarkably similar experience with my 2006 E350 a couple of days ago. I had to brake hard to avoid a guy who cut me off in front on the freeway. After I let go off the brakes and tried to accelerate, the car won't accelerate well. Luckily, the freeway was a bit congested and I was near the exit I was going to take. Up until parking at my work about 5 minutes later, the accelerator didn't respond well. I turned the engine off and checked again after a few hours. It responded fine.

Suspecting something is wrong/intermittent, I took the car to the dealer, and they ran the diagnostics. They said they "found conductor plate faulty" and "found code (Internal speed Sensor is not available)". They said they need to replace conductor plate. Strangely, the quote for it was $1100, same as what was mentioned below! I declined it to talk to Mercedes Customer Hotline first to see if I could convince them that this is a safety issue and they should fix it. The dealer said what they would replace is the transmission electronic control module. Didn't quite understand what a conductor plate is, and why that meant control module! If anyone could shed some light, I would be very grateful. Thank you.

Venkat
Shed some light on what, what's your actual question?

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post #10 of 15 (permalink) Old 09-17-2011, 08:47 PM
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Sorry about the confusion. I wanted to know what a conductor plate is (which the dealer said is faulty), and how it is related to transmission control module (which the dealer said I have to replace). Thank you for your help.
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