You do not have to remove the sway bar. You unbolt the bolt in the front of the sway bar and remove the bolt/washer and front rubber bushing.
To remove the UCA you have to disconnect the steering knuckle. To do this and not have the coil spring let loose you have to remove the coil spring.
I have heard of guys using a floor jack under the LCA to support the LCA and spring assembly. this keeps the coil spring compressed. BE VERY CAREFUL IF YOU DO IT THIS WAY. If the LCA shifts or is allowed to come off the floor jack the coils springs full force will be released. DEATH MAY RESULT. When the coil spring lets loose.
Once the UCA is allowed to be released, the UCA mounting bolt is unscrewed and removed, the UCA moves forward and around the sway bar. Remember it is now disconnected from the steering knuckle
If your doing this, replace the sway bar bushings, while your at it. Check the uper ball joint. Now would be the time to replace it if worn. You replace the UCA . You cannot replace the ball joint in the UCA, you have to buy a new UCA.
Do a search on 300Td suspension replacement. I posted what I did on my 82 300Td suspension rebuild.
1970 220D, owned 1980-1990
1980 240D, owned 1990-1992
1982 300TD, owned 1992-1993
1986 300SDL, owned 1993-2004
1999 E300, owned 1999-2003
1982 300TD, 213,880mi, owned since Nov 18, 1991- Aug 4, 2010 SOLD
1988 560SL, 100,000mi, owned since 1995
1965 Mustang Fastback Mileage Unknown(My sons)
1983 240D, 176,000mi (My daughers) owned since 2004
2007 Honda Accord EX-L I4 auto, the new daily driver
1985 300D 264,000mi Son's new daily driver.(sold)
2008 Hyundai Tiberon. Daughters new car