How Replace Transmission Control Unit module/connector
MBWorld Fanatic!
Joined: May 2007
Posts: 1,435
Likes: 0
From: Nebraska
99CLK320,
in one of the post somewhere for the fluid change procedure it was mentioned that with your buddy in the car with his foot on the brake etc. It didn't say the trans has to be in gear. I assume it does to pump out fluid, yes? And, if so, if you put the car in park will that stop the fluid from pumping out or do you have to turn the car off? TIA.
Thread Starter
Senior Member
Joined: Dec 2001
Posts: 494
Likes: 13
From: Amber waves of grain.
2000 CLK430 Cabriolet
in one of the post somewhere for the fluid change procedure it was mentioned that with your buddy in the car with his foot on the brake etc. It didn't say the trans has to be in gear. I assume it does to pump out fluid, yes? And, if so, if you put the car in park will that stop the fluid from pumping out or do you have to turn the car off? TIA.
Newbie
Joined: Jul 2011
Posts: 10
Likes: 2
2002 E430 AWD
My TCU, 030 545 23 32, appears to be dead from wickering transmission fluid. I've found a few used ones around for a lot less then the grand the dealer is charging.
The mechanic is recommending that I also replace the wires because of the oil. He is not going to replace the harness but instead run new wires. Is this necessary?
Is there a compatibility issue with using a used TCU?
It appears that the only other thing that needs replacing is the connector / adapter. What about any electrical components in the transmission?
Thanks,
David
The mechanic is recommending that I also replace the wires because of the oil. He is not going to replace the harness but instead run new wires. Is this necessary?
Is there a compatibility issue with using a used TCU?
It appears that the only other thing that needs replacing is the connector / adapter. What about any electrical components in the transmission?
Thanks,
David
Member
Joined: May 2010
Posts: 201
Likes: 0
2004 C32 AMG - 2009 C300 Sport
My TCU, 030 545 23 32, appears to be dead from wickering transmission fluid. I've found a few used ones around for a lot less then the grand the dealer is charging.
The mechanic is recommending that I also replace the wires because of the oil. He is not going to replace the harness but instead run new wires. Is this necessary?
Is there a compatibility issue with using a used TCU?
It appears that the only other thing that needs replacing is the connector / adapter. What about any electrical components in the transmission?
Thanks,
David
The mechanic is recommending that I also replace the wires because of the oil. He is not going to replace the harness but instead run new wires. Is this necessary?
Is there a compatibility issue with using a used TCU?
It appears that the only other thing that needs replacing is the connector / adapter. What about any electrical components in the transmission?
Thanks,
David
this is what i am having to have done....$400 there replacing the multi plug to fix leak and run new wires/harness/plugs...it appears my TCU may be fine
MBWorld Fanatic!
Joined: Jan 2005
Posts: 1,064
Likes: 5
From: Northern Virginia / D.C.
01 LORINSER CLK 430 - 02 KLEEMANN CLK55 - 88 Euro / Jap AMG 560 SEC Widebody - 16 AMG GTS
Here is a link to a great DIY on replacing the leaky little adapter plug. The DIY in the link also describes another transmission procedure, but I found it particularly useful in helping me to locate the adapter plug, as there are pics of the plug "in place."
Replacing AT Adapter Plug
Replacing AT Adapter Plug
