Well, the figure you linked to only shows the center drag-link (bottom left), which is usually ok (but may need to be replaced): 120 (D46-373)
The tie-rod ends are found in this diagram (top right): http://www.niemoeller.de/w113-en/B042-331.html
They are numbered 91 (C33-128) and 92 (C33-129), although I can't seem to locate them in the price list. The price list has only one ball-joint listed (91), and refers to yet another part number (C33-126).
You can either replace the individual toe-rod ends, or replace the complete tie-rod assembly: comes with the tie-rod itself, a pair of ball-joints, and a pair of clamps. There is a tie-rod assembly on each side, left and right. Each tie-rod has a pair of ball-joints attached (also referred to as the tie-rod ends): one with left-hand (L.H.) thread, and the other with right-hand (R.H.) thread. So in total, you'll need a pair of L.H. ball-joints, and a pair of R.H. ball-joints. Removal is done by first removing the castle nuts (and cotter pins if installed), and then using a ball-joint puller to remove the tie-rods. Once the clamps on each end of each tie-rod are loosened, the tie-rod ends can be unscrewed off the tie-rod. This step usually requires a pair of pipe wrenches. Installation is the reverse of removal.
You will need to get your car aligned after replacing the ball-joints. In order to get an approximate alignment so you don't drive off the road on your way to the alignment shop, count the number of rotations needed to remove each ball-joint. Install the new ball-joints with the same number of rotations. This is also known as "counting threads". Remember: there are LH and RH threads, so they rotate in opposite directions.
In the past, I've actually found the number of threads on each side to be grossly unbalanced (much more on one side of a tie-rod than on the other). In this case, I simply count the total number of threads for each rod; divide that between the two ball-joints, and then proceed with installation. This gives an excellent starting point for the alignment technician.
Hope this all helps.