P0705 Code - Transmission sensor - mechanic says only dealer can fix
Thread Starter
Junior Member
Joined: Nov 2007
Posts: 45
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From: Sugar Land, TX
2010 C350; 2022 MB GLE350
P0705 Code - Transmission sensor - mechanic says only dealer can fix
I've been lurking for a week or more and reading various posts on the forum regarding the P0705 error and the transmission conductor plate. The check engine light came on in my 2010 MB C350 about a month ago. I cleared the code because the car has been driving fine, but it keeps coming back. 
Today I called my local Mercedes mechanic in Atascocita, TX (Houston suburb) and he said that he cannot change the transmission conductor plate because Mercedes considers it an "anti-theft" device (my regular mechanic referred me to these guys). Hence, he said that I would have to take it to the dealer for the repair and it would be about an $1,800 job.
I am looking for some advice on this one because I'm not sure who to believe. I just laid out $500 for a thermostat change at the dealer two months ago and have no desire to pay those rates again. I am still paying down medical bills from radiating a brain tumor last year.
Any help is appreciated. Many thanks.
Today I called my local Mercedes mechanic in Atascocita, TX (Houston suburb) and he said that he cannot change the transmission conductor plate because Mercedes considers it an "anti-theft" device (my regular mechanic referred me to these guys). Hence, he said that I would have to take it to the dealer for the repair and it would be about an $1,800 job.
I am looking for some advice on this one because I'm not sure who to believe. I just laid out $500 for a thermostat change at the dealer two months ago and have no desire to pay those rates again. I am still paying down medical bills from radiating a brain tumor last year.
Any help is appreciated. Many thanks.
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Joined: Apr 2016
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From: Milwaukee, WI
2010 C300 4MATIC........ 2011 C63 AMG.............. 2015 CLS400 4MATIC.....
I did thermostat for $65 myself, so do not do stuff at dealer.
Although as far as I know, the conductor plate is not a diy job...I do not have experience with it though...but I've spent much more on this car is all I can say.
As Colin said, glad you're still here. Best in health.
Although as far as I know, the conductor plate is not a diy job...I do not have experience with it though...but I've spent much more on this car is all I can say.
As Colin said, glad you're still here. Best in health.
Thread Starter
Junior Member
Joined: Nov 2007
Posts: 45
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From: Sugar Land, TX
2010 C350; 2022 MB GLE350
Thread Starter
Junior Member
Joined: Nov 2007
Posts: 45
Likes: 0
From: Sugar Land, TX
2010 C350; 2022 MB GLE350
I did thermostat for $65 myself, so do not do stuff at dealer.
Although as far as I know, the conductor plate is not a diy job...I do not have experience with it though...but I've spent much more on this car is all I can say.
As Colin said, glad you're still here. Best in health.
Although as far as I know, the conductor plate is not a diy job...I do not have experience with it though...but I've spent much more on this car is all I can say.
As Colin said, glad you're still here. Best in health.
MBWorld Fanatic!
Joined: May 2015
Posts: 4,037
Likes: 1,012
From: Miami, FL
2003 CL 600
MB won't sell the conductor plate outside of the dealership, so you don't have a lot of options there. Even if they did sell it, it has to be learned in via SDS so it's not just a simple driveway swap. The actual procedure to replace it is not difficult, just a trans service plus unbolting the valve body and then removing the plate and installing the new one. The programming is what keeps it from being DIY'able though.
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From: Jersey Shore
2012 GLK
https://mbworld.org/forums/c-class-w...-repair-2.html
its great you got it running C300. after that guy pluto said it couldnt be done i was also doubting youd be able to do it without star computer. good job man!
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MBWorld Fanatic!
Joined: May 2015
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From: Miami, FL
2003 CL 600
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2008C4Matic
I have gotten pretty friendly with MB of Chandler here in AZ. MB is run like the FBI of the automotive world.
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Joined: May 2015
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From: Miami, FL
2003 CL 600
The plate is available separately, I change them all the time. You only have to replace the entire VB if you have the earlier VGS 1 or 2. If the car has a VGS3 VB in it already, there's a repair kit that is just the conductor plate/TCM itself.
Junior Member
Joined: Apr 2017
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Mercedes C250 Sedan 2013
I just bought a TCM from my local dealer for about USD900.
Fixed the TCM and programmed it, and after programming the transmission likes to stay on the higher gears, but after driving sometime now it's become normal. Anyway, I had a speed sensor error.
If you want a TCM (unused, brand new in a box) let me know, we have it here.
Fixed the TCM and programmed it, and after programming the transmission likes to stay on the higher gears, but after driving sometime now it's become normal. Anyway, I had a speed sensor error.
If you want a TCM (unused, brand new in a box) let me know, we have it here.
Newbie
Joined: Jan 2019
Posts: 7
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From: clearwater fl
c 250 2013
p0705
I've been lurking for a week or more and reading various posts on the forum regarding the P0705 error and the transmission conductor plate. The check engine light came on in my 2010 MB C350 about a month ago. I cleared the code because the car has been driving fine, but it keeps coming back.
Today I called my local Mercedes mechanic in Atascocita, TX (Houston suburb) and he said that he cannot change the transmission conductor plate because Mercedes considers it an "anti-theft" device (my regular mechanic referred me to these guys). Hence, he said that I would have to take it to the dealer for the repair and it would be about an $1,800 job.
I am looking for some advice on this one because I'm not sure who to believe. I just laid out $500 for a thermostat change at the dealer two months ago and have no desire to pay those rates again. I am still paying down medical bills from radiating a brain tumor last year. I got the same code p0705 aamco said the conductor plate to another Machanic said he said ranger sensor that is a switch I am not a Machanic online forums I been reading my car bought iy 10 months ago I have 56k miles drives great even says light engine
Any help is appreciated. Many thanks.
Today I called my local Mercedes mechanic in Atascocita, TX (Houston suburb) and he said that he cannot change the transmission conductor plate because Mercedes considers it an "anti-theft" device (my regular mechanic referred me to these guys). Hence, he said that I would have to take it to the dealer for the repair and it would be about an $1,800 job.
I am looking for some advice on this one because I'm not sure who to believe. I just laid out $500 for a thermostat change at the dealer two months ago and have no desire to pay those rates again. I am still paying down medical bills from radiating a brain tumor last year. I got the same code p0705 aamco said the conductor plate to another Machanic said he said ranger sensor that is a switch I am not a Machanic online forums I been reading my car bought iy 10 months ago I have 56k miles drives great even says light engine
Any help is appreciated. Many thanks.
shifter
Thread Starter
Junior Member
Joined: Nov 2007
Posts: 45
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From: Sugar Land, TX
2010 C350; 2022 MB GLE350
