Need Some Help!

My son is away at school with his 1986 190E 2.3-16 and called last night to tell me the clutch had failed on the car. His described the event as a "Pop!" followed by some metallic knocking as he tried to pull away from a stop. He also noted the transmission would go into gear but the car failed to move with the clutch engaged (foot off the pedal). So, the car stopped and would not move under power anymore (it rolls around nicely though as he had to push it into a parking spot). This sounded a bit strange for a clutch failure so I had him put it in gear and start the car, then with the car in gear and going nowhere, he got under the car as best he could to look around at what might be making the noises. Lo and behold, the noise was coming from the half shaft stub on the driver's side, which had fallen out of the rubber boot.

I ordered a new half shaft from Phil at Partsshop today, and I am wondering what else I will need to replace the half shaft. I am also wondering if anyone here has performed this task and can give some advice. It looks pretty crowded in there and if there is a special sequence to doing this please share it with us. Also, are there any special tools I can't get at Sears required? By the way, I did a search on this and got some good descriptions, but all on W123 and W126 vehicles. No W201s, and very little on a W124.

Thanks in advance, Jim

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Own:
1986 Euro 190E 2.3-16 (291,000 miles),
1998 E300D TurboDiesel, 231,000 miles -purchased with 45,000,
1988 300E 5-speed 252,000 miles,
1983 240D 4-speed, purchased w/136,000, now with 222,000 miles.
2009 ML320CDI Bluetec, 89,000 miles

Owned:
1971 220D (250,000 miles plus, sold to father-in-law),
1975 240D (245,000 miles - died of body rot),
1991 350SD (176,560 miles, weakest Benz I have owned),
1999 C230 Sport (45,400 miles),
1982 240D (321,000 miles, put to sleep)