Where is the TCU
MBWorld Fanatic!
Joined: Nov 2001
Posts: 6,340
Likes: 22
From: Southern California, USA
2003 CL55 AMG
The ECU and TCU are in the right (passenger) side fuse box in the engine compartment. The engine computer should be the really obvious one with 5 plugs coming into it. The transmission control unit is UNDER the fuse box. That's right, you have to lift the fuse box up to get to the tiny little black TCU.
Looks like this:
Looks like this:
Last edited by awiner; Sep 2, 2013 at 09:17 PM.
Senior Member
Joined: Feb 2010
Posts: 390
Likes: 2
From: SoCal
CL65, FJ80, Sportsmobile 4x4, Model X Plaid
The ECU and TCU are in the right (passenger) side fuse box in the engine compartment. The engine computer should be the really obvious one with 5 plugs coming into it. The transmission control unit is UNDER the fuse box. That's right, you have to lift the fuse box up to get to the tiny little black TCU.
Looks like this:
Looks like this:
I want to check for trans oil wicking via the tcu wire harness into the TCU box.
