Transmission problems, car doesn't move
Thread Starter
Newbie
Joined: Jun 2019
Posts: 11
Likes: 0
W203
Transmission problems, car doesn't move
Hello. I have a mb c240 -01 with 2.6 V6 engine. Problem is the transmisson. After stoping at a stopsign the car did not move at all. After turning it off and cool down it could work about 10 min. I changed the oil and conduktor plate and the car workd perfectly, but only for a couple of hours. Had the oil tested after that, and there was glycol in it. I took out the transmission and cleaned everything and changed the radiator. But the car still wont work.
Sometimes I can drive it obout 10min and sometimes work only in 2:nd gear or doesn't move at all.
Had it to a shop now and read codes with a star. They said that the tcu did not conect to the gearbox. They tried with another tcu but the car still did not move and no fault codes.
Also esp abs and bas light is on. Esp was on before, and abs and bas came after the transmisson started acting up.
So whar could the problem be? The tcu? Or have the glycol leak destroyd the transmisson? Or the torque converter?
Sometimes I can drive it obout 10min and sometimes work only in 2:nd gear or doesn't move at all.
Had it to a shop now and read codes with a star. They said that the tcu did not conect to the gearbox. They tried with another tcu but the car still did not move and no fault codes.
Also esp abs and bas light is on. Esp was on before, and abs and bas came after the transmisson started acting up.
So whar could the problem be? The tcu? Or have the glycol leak destroyd the transmisson? Or the torque converter?
Thread Starter
Newbie
Joined: Jun 2019
Posts: 11
Likes: 0
W203
Thread Starter
Newbie
Joined: Jun 2019
Posts: 11
Likes: 0
W203
I also have checked the pin plug. And it was also changed at the same time as the conductor plate.
But the car should move even if the pin plug is disconected, but only in 2:nd gear and reverse. Or so I have been told.
But the car should move even if the pin plug is disconected, but only in 2:nd gear and reverse. Or so I have been told.
MBWorld Fanatic!
Joined: May 2017
Posts: 2,290
Likes: 434
C320
If you found grycol in the transmission the damage might already be done. The lack of communication with TCM could be that the shop is incompetent. It sounds like you're pretty handy so get your own scan tool and go from there. You might have to buy a new transmission but they're dirt cheap used. Consider using a completely separate transmission cooler so there is zero chance of future contamination.
Senior Member
Joined: Sep 2017
Posts: 499
Likes: 66
From: N.Y. L.I.
04 E55 AMG BLK/BLK(MyDD), 06 CLK 500 (wife's) 07 ML500, 2012 C300(son's)
If you found grycol in the transmission the damage might already be done. The lack of communication with TCM could be that the shop is incompetent. It sounds like you're pretty handy so get your own scan tool and go from there. You might have to buy a new transmission but they're dirt cheap used. Consider using a completely separate transmission cooler so there is zero chance of future contamination.
LOL my desk top is cooked, I'm on a semi broken laptop....
Last edited by Pmarino; Jun 10, 2019 at 02:17 PM.
Thread Starter
Newbie
Joined: Jun 2019
Posts: 11
Likes: 0
W203
If you found grycol in the transmission the damage might already be done. The lack of communication with TCM could be that the shop is incompetent. It sounds like you're pretty handy so get your own scan tool and go from there. You might have to buy a new transmission but they're dirt cheap used. Consider using a completely separate transmission cooler so there is zero chance of future contamination.
Trending Topics
Thread Starter
Newbie
Joined: Jun 2019
Posts: 11
Likes: 0
W203
I have also been thinking about rebuilding the transmisson. The plate and bearing kit doesn't cost that much, but if the torque converter is broken it might cost a bit more. It' also a problem to buy a used transmisson when it is a V6 engine it need to be from a V6 engine to fit. I might get a transmisson from a E320 to fit but I don't know if it will work because the numbers are not the same. (Mine is 722696 and the E320 has 722618)
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Senior Member
Joined: Sep 2017
Posts: 499
Likes: 66
From: N.Y. L.I.
04 E55 AMG BLK/BLK(MyDD), 06 CLK 500 (wife's) 07 ML500, 2012 C300(son's)
I have also been thinking about rebuilding the transmisson. The plate and bearing kit doesn't cost that much, but if the torque converter is broken it might cost a bit more. It' also a problem to buy a used transmisson when it is a V6 engine it need to be from a V6 engine to fit. I might get a transmisson from a E320 to fit but I don't know if it will work because the numbers are not the same. (Mine is 722696 and the E320 has 722618)
Transmission 722696
18 COMPATIBLE MODEL YEARS
Mercedes-Benz C230 2002, 2003, 2004, 2005 Mercedes-Benz C240 2001, 2002, 2003, 2004, 2005 Mercedes-Benz C32 2002, 2003, 2004 Mercedes-Benz C320 2001, 2002, 2003, 2004, 2005 Mercedes-Benz C55 2005Last edited by Pmarino; Jun 10, 2019 at 05:04 PM.
Thread Starter
Newbie
Joined: Jun 2019
Posts: 11
Likes: 0
W203
However, do anyone know if the gearbox numbers have to be the same or can i just swap to, for exempel the mb E modells gearbox?
Senior Member
Joined: Sep 2017
Posts: 499
Likes: 66
From: N.Y. L.I.
04 E55 AMG BLK/BLK(MyDD), 06 CLK 500 (wife's) 07 ML500, 2012 C300(son's)
Error codes 722.6
There will be differences in the sump pan as well as ratios and other internal's. I'm no expert but you can take a look at the trouble shooting guide I attached.
Thread Starter
Newbie
Joined: Jun 2019
Posts: 11
Likes: 0
W203
Okej then I think its better to try to find one with the same numbers. But it might be more interesting to rebuild. Starting with the tcm. Then take apart the transmisson, again. If i change the conduktor plate, solenoids, change all the plates and bearing ( the hole kit) and put in the sonnax kit I should be closer to get it back on the road. If doing this, do I have to learn the transmisson or code it somehow or can i just go driving?
Senior Member
Joined: Sep 2017
Posts: 499
Likes: 66
From: N.Y. L.I.
04 E55 AMG BLK/BLK(MyDD), 06 CLK 500 (wife's) 07 ML500, 2012 C300(son's)
If you can a hold of a SDS you can look at PSI values and tell how much is left on your friction plates. Then once you get inside you can look at (for) the glycol contamination. Might be worth it to get a low miles unit and do what you are planning. If your TCU is good you should not have a problem. I highly suggest you get a SDS.
Thread Starter
Newbie
Joined: Jun 2019
Posts: 11
Likes: 0
W203
If you can a hold of a SDS you can look at PSI values and tell how much is left on your friction plates. Then once you get inside you can look at (for) the glycol contamination. Might be worth it to get a low miles unit and do what you are planning. If your TCU is good you should not have a problem. I highly suggest you get a SDS.
Also they had a star scanner at the shop where I had the car but I think they may not really know how to use it.
As I wrote before I have already taken the transmisson apart and cleaned and checked everything. Problem is that it was a first timer so I did not really know how everything should look like. I did measure the friction plates, and they were okej. But they felt a bit soft and crubled a bit when toutching, so they may not do their jobb anymore.
Senior Member
Joined: Sep 2017
Posts: 499
Likes: 66
From: N.Y. L.I.
04 E55 AMG BLK/BLK(MyDD), 06 CLK 500 (wife's) 07 ML500, 2012 C300(son's)
http://www.w124performance.com/docs/..._ATSG_2004.pdf
https://lx.abodiesonline.com/Manuals/NAG1%20Manual.pdf
http://atraonline.com/gears/2006/2006-04/2006-04_04.pdf
Yes, Star Diagnostic System
https://lx.abodiesonline.com/Manuals/NAG1%20Manual.pdf
http://atraonline.com/gears/2006/2006-04/2006-04_04.pdf
Yes, Star Diagnostic System
Last edited by Pmarino; Jun 12, 2019 at 08:27 AM.
Thread Starter
Newbie
Joined: Jun 2019
Posts: 11
Likes: 0
W203
That what a lot off reading, but very helpfuel thank you.
How about the tcm. Does anyone know what the numbers meen and do they have to be the same
(A 027 545 02 32, egs51, 5wk33921) these numbers are on my tcm.
How about the tcm. Does anyone know what the numbers meen and do they have to be the same
(A 027 545 02 32, egs51, 5wk33921) these numbers are on my tcm.
Senior Member
Joined: Sep 2017
Posts: 499
Likes: 66
From: N.Y. L.I.
04 E55 AMG BLK/BLK(MyDD), 06 CLK 500 (wife's) 07 ML500, 2012 C300(son's)
https://www.benzworld.org/forums/w21...ol-module.html
This thread may help you, particularly #4 & 7
Don't forget pages 20-22 in the ATSG manual
Finally got into my old hard drive....https://www.valvebodypros.com/assets...to-upshift.pdf
BTW I don't believe the shop that said you had no codes.
This thread may help you, particularly #4 & 7
Don't forget pages 20-22 in the ATSG manual
Finally got into my old hard drive....https://www.valvebodypros.com/assets...to-upshift.pdf
BTW I don't believe the shop that said you had no codes.
Last edited by Pmarino; Jun 13, 2019 at 11:01 AM.
Thread Starter
Newbie
Joined: Jun 2019
Posts: 11
Likes: 0
W203
It would not be totaly impossible that the problem is electronical. I haven't actually checked any electrical parts or checked that there is enough power to them. unfortunately I dont know **** about electronics or their parts. But again I did not know anything about transmissons either. Guess I have to learn.
I checked the codes with another tester before the star tester. And that tester said : the gear ratio is inplausible or transmisson is slipping. Or something like that. So that the star did not say anything seems strange.
I checked the codes with another tester before the star tester. And that tester said : the gear ratio is inplausible or transmisson is slipping. Or something like that. So that the star did not say anything seems strange.
