OK, so I'm getting ready to replace the TCC Solenoid, as mentioned here:
https://mbworld.org/forums/e-class-w...11-2004-a.html
I've watched the videos they suggest, found some other videos, but never quite found a DIY guide. No problem, as I think I understand what needs to be done.

Here is my dumb question. I've never really fooled around with a transmission, so I'm just not sure... Do I need to drain (and consequently replace) the transmission fluid to drop the pan? Or, will the fluid drain to another location when I jack the car up? Replacing the solenoid itself should be pretty straight forward, but on the videos I watched, they were using transmissions that were completely removed from various vehicles, so they were already clean and w/o fluid. Also, if anyone has any tips, that'd be awesome too.

 

Yes you have to drain the ATF fluid in order to remove the pan and the filter to gain access to the valve body. It will be better if you get new filter and pan seal to replace them, plus new ATF fluid.

 

Perfect, thanks.

 

Well, I've done my brakes, ball joints, lower control arms, and a few other, minor things (like filters, MAF, AC control unit is next, etc) without any issues, on this car. I've had plenty of fun with another transmission, but it was slightly less advanced transmission (as it is on a 1970 chevy truck I'm rebuilding). Just never anything this "fancy." I'd rather be a bit dumb up front on the simple stuff vs ending up with a face full of ATF fluid.

Doing the numbers, aside from my time, I could replace this part, plus the fluid, filter, and gasket, for only slightly more than going to my nearest mechanic to have him test it.

But, you do raise some good points, especially taking note of the conductor plug.