Not sure if this is the case for your vehicle, but w123s after July 1982 indicate a range of proper alignment by way of stamps on the two halves of the driveshaft. See attached illustration from the FSM, §41-050.

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'Betsy the Getaway Car' : 1978 MB 240D, 582k
'The Mistress of the Sea' : 2001 Giant Boulder, 10.30k