Went thru the TSB titles here and didn't see anything contrary to what was published by MB.
http://www.alldata.com/TSB/35/84352004.html

There is a 1982 TSB for electric hoist adapter; but that's about as close as I saw. I used 1984 300SD as reference.

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The Golden Rule

1984 300SD (bought new, sold it in 1988, bought it back 13 yrs. later)