After reading some additional threads regarding the shift delay code, it sounds like I can safely ignore this issue for the time being. Supposedly, the transmission may shift slightly differently because of a vacuum leak, but I don't believe it's something I need to urgently fix. Please let me know if my thinking is off...thanks!

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1982 300D-T (sold)
1988 300E (sold)
1994 E320 Wagon (sold)
1995 E320
1998 E300D-T
1999 E3204M Wagon
2001 E320
2005 E320 CDI