No, it's that simple, just disconnect the lines. I would have plenty of rags and something to plug the line to lessen the leakage.
Why are you replacing them and on which "T" model? Also, once you change them, you will need to put a truck load of weight in the backend and run the engine to high idle to "bleed" the system. Once the backend comes up, check the level in the res. and add as needed. Use only the hyd. fluid you can get at either a dealer or better yet from Fastlane. The fluid is made by Feibi-Bilstein.

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1999 MB SL500 (110,000 mi)
2004 Volvo V70 2.5T (220,000 mi)
2014 Tesla Model S 85 (136,000 mi)
MBCA member