Good luck with the seals. If you do find them, you might need to check with ATE about the torque specs for the halves. In the manual, it says not to separate the halves because they are torqued unequally at the factory.

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63 220S W111
76 300D W115
2013 VW JSW TDI M6

previously-
73 280 SEL 4.5
86 300E 5 speed
2010 VW Jetta TDI M6