On my 380SL, which I think is the same basic design, I dosed the shaft-cage joint liberally with PB Blaster, then clamped one end of the shaft in a vice, and turned the cage on the shaft back and forth while applying pressure to pull it off. Then clamped the other end of the shaft and removed the second cage the same way.

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Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe