Daniel,
Welcome to Benzworld, and thank you for your post!
First I want to say that you posted your thread was on the W140 S-Class section of Benzworld, yet I could leave it there, but the 2nd generation 722.6 you have has some changes not applicable to the 722.6 used in the W140's, and the thread you replied to one valve body part does not apply to you as it was used in the 1st Generation 722.6 of the 90's
My name is Martin, and the Moderator of the W140 forum, and I happen to create the 722.6 rebuild threads, but I think you should have your own thread in the W203 section of Benzworld, but I can help you with all your questions....
1) What issues are you having with your 03 722.6 ?
2) Before you rebuild lets go over what is wrong, but these 722.6's last a long time.
3) If you replace the conductor plate, the TCU will accept any conductor plate of any make, but.... some of those super cheap conductor plates on Ebay do not really work well, and it has been documented by some, so avoid those $70/$80 dollar units.
4) The adaptions can be reset in MBStar, but you can clear them with your key like in post #1 of this thread:
http://www.benzworld.org/forums/w210-e-class/1329576-wow-diy-transmission-comp-reset.html
Here is a more formal way
http://www.benzworld.org/forums/w210-e-class/1387073-post-graduate-education-your-22-6x.html
5) Is it absolutely necessary to reset no. The car will shift all the gears pretty good with no problem.
6) About the car not moving after the conductor replacement, a fallacy in the longest way.... If you have a defective conductor plate, worse case you will be in full-limp mode of 2nd gear and reverse. Really what you are looking for in bad conductor plate is ruptured speed sensor, or a speed sensor with a hairline crack viewed with a magnifier-those are a no no...
The true way to identify a bad conductor plate is to measure the two speed signals at the TCU with a dual trace oscilloscope like in the attachment...
Now, In MB Star one can perform a test to find out how worn are your frictions are. Here is a thread on it.
http://www.benzworld.org/forums/w140-s-class/2212242-handy-way-determine-how-worn-out.html
The MB Star to get is the one on post 14, and I have that same one, but you need to get it configured to the Dell D630 as you need a true RS232 port not a USB to RS232 converter, so buy a working D630 on Craigslist or Ebay, and the Chinese unit will come with a hardrive, and you will install the drive on the Dell, and activate the software. Support just ask it on the same thread, but do not want to go through all of that. Paul600600 sell systems with live one on one support.
http://www.benzworld.org/forums/r129-sl-class/2315329-got-my-mb-star-c4-diagnostic.html
Now, fluid in the TCM will make the transmission go wonky, and 98%/99% of the time you can clean it with electrical contact cleaner. here is how I do it..
Your TCM I think is located under the front passenger foot carpet under a plate held down with two 10mm nuts:
http://www.benzworld.org/forums/w21...e-questions-testimony-please.html#post9039089
Also, your shifter bushings can cause problems too, so check them out too...
http://www.benzworld.org/forums/w210-e-class/1413815-photo-diy-shifter-bushing-replacement.html
Lastly, If you want to rebuild, I have all the service manuals and 300 or so High-Resolution photos. The 722.6 of any flavor is the best tranny to DIY for the first timer it is real easy.
http://www.benzworld.org/forums/w140-s-class/2544649-new-revised-722-6-service-manual.html
Really, what is wrong with your 722.6??
Martin