Do you need to disconnect the battery when removing the transmission control module?
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Junior Member
Joined: Oct 2016
Posts: 16
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From: Nor Cal
2005 MB CL55 AMG, 2007 MB GL450 4matic, 2002 MB CL55 AMG
Do you need to disconnect the battery when removing the transmission control module?
I looked everywhere and I can't get any removal instructions.
Faulty connector pin caused transmission oil go into my TCM. I know they can be opened and cleaned with Electrical cleaner. The ATF doesn't damage the $1000 TCM from my research. I just have a few questions before I remove it.
Do I need to disconnect the battery before removing it?
How do I get it out? I know it's in the engine bay by the left fuse box.
How do I go about opening the TCM exposing the electrical parts?
Thanks in advance.
722.6 Transmission
Faulty connector pin caused transmission oil go into my TCM. I know they can be opened and cleaned with Electrical cleaner. The ATF doesn't damage the $1000 TCM from my research. I just have a few questions before I remove it.
Do I need to disconnect the battery before removing it?
How do I get it out? I know it's in the engine bay by the left fuse box.
How do I go about opening the TCM exposing the electrical parts?
Thanks in advance.
722.6 Transmission
Last edited by Genaro Calderon; Apr 25, 2017 at 12:38 AM.
MBWorld Fanatic!
Joined: Nov 2010
Posts: 2,605
Likes: 343
From: Welwyn, Herts, UK
2006 S600
It's probably not essential, but it's good practice. I think most people would recommend disconnecting the battery when removing electronics.
There's always a risk that re-connecting the battery will cause a spike that causes damage, so it's not a black and white decision, but on balance of probabilities, I would say disconnect first.
Nick
There's always a risk that re-connecting the battery will cause a spike that causes damage, so it's not a black and white decision, but on balance of probabilities, I would say disconnect first.
Nick
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