Need to replace the multi-plug/ pilot bushing on a 722.6 trans in a C250 TD. Tips?

[chizzel89]

Traced the trans fluid leak on my C250 to the multi-plug. Box behaved normally despite having lost nearly a litre of fluid over the last 10k miles. Its been kinda oozing away.
The fluid, filter and sump gasket were all done 10k miles ago, so I'm just doing the multi-plug and getting the fluid level just right.
Has anyone done this and could they give me a 'how to'...
Which way to twist the beige plastic plug etc... what holds it in.
The car is up on ramps at the front so it shouldnt loose much fluid and I have a tub of comma MV ATF (which meets all the relevant MB specs) ready, and ofcourse a dip-stick.

Is it worth checking the other end of the multi-plug lead for oil contamination? How do I do this? If I find oil, do I just spray loads of contact cleaner on there until it dries out?

thanks in advance.

 

[142 TPL]

I have just done this on mine it was easy. Turn the coller anti clockwise to release the plug. As you turn the plug comes out. Then undo the bolt that is in middle of the plug hole and pull the whole lot out. Make sure that you have both the old O rings as one can get left in. The secret to fitting the new one is to smear the O ring with clean ATF and it should pop straight back in just make sure it is lined up. Tighten bolt. Clean plug with electrical cleaner and put it back by turning the coller clockwise to draw it in. Really it's no big deal

 

[SKIPPERDOG]

make sure you dont over tightening it its only plastic if its leaking put around 3/4 of a litre into the gearbox

 

[chizzel89]

Is it worth taking a look at the other end of that lead that goes to the control box to see if the ATF has tracked up there?
Do I have to pull the drivers foot well carpet up to do this?
Judging by how its spread all over the trans pan I can see how it could get into the control box.... though the cable leading to it does go vertically up so that would slow it down a bit.

 

[Alps]

yep, just lift the carpet out and theres a few 10 mm plastic bolts holding the metal panel onto the floor where the control box is.

just dont overtighten the bushing thats the main thing

 

[E55BOF]

I don't think the 'transmission ECU loom full of fluid' problem has anything to do with the pilot bushing leaking to the outside of the gearbox; it is caused by the gearbox connector plate, within the gearbox, leaking fluid through to the multi-plug, and from there up the loom.

I went to change my pilot bushing, but it would not come out (yes, I did remember to loosen off the central bolt...), and as it was not leaking, rather than apply force and end up with a bit breaking off but it still not coming out, I left well alone. I'll see the drips if it starts to leak...

 

[Druk]

Torque of centre bolt is 2Nm.