Did a quick search here- lots about tensioner replacement, not a lot on pulley failure. Mine came off, stuck in the fan blades but otherwise car ran ok.

Looking at the remains (pulley wheel fine, bearing races gone away, half dozen ball bearings in pan under engine, belt kinda chewed up), how does the pulley mount on the shaft? What held it in place? Front cover was still on pulley.

Reading manual and posts here I get the tensioner replacement- but seeing as how the pulley is sold on its own can the pulley be replaced and the belt installed via loosening the altenator? Are the bearing races what keep it on? I cannot for the life of me get a good look at the shaft because of the location. Is there a bolt that goes in under the plastic snap on cover?

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95 E300D gave away
77 300D, 227k, station car
83 300CD 370k, body gone away to the rust gods, engine is in a Yota pickup, going strong
89 190E 2.6- 335k, no more
79 VW FI Bus- 154k summer driver
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12 VW Jetta- 250k
74 MG Midget-78k