Purchased a new key tumbler for my 1990 300SE from the dealer. Installation seems straight forward to me, but reading up on it I see it can be tricky if not installed right for the later W126 models (1990-1991).

Anything I need to be aware of when installing the new tumbler?

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1979 Black on Black, 300CD (sold), 1990 Black 300SE, Silver 1989 Volvo 780, 1988 300CE (vanished by the hands of a girlfriend), 1992 300CE (Rescue).