Cal, yes the explosive burps are gone.
I did not have to replace the plug wires or boots as they checked out OK.
No grey residue on the outside of wires and no visible electrical arches from boots.

The 300Se always had minor rough idle, but the sypmtoms that were just addressed were way beyond that.

__________________
1979 300D 220 K miles
1995 C280 109 K miles
1992 Cadillac Eldorado Touring Coupe 57K miles SOLD
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1979 240D 140Kmiles (bought for parents) *SOLD.
SAN FRANCISCO/(*San Diego)
1989 300SE 148 K miles *SOLD