The item description says nothing about M103 or M104, just:

" Mercedes Ignition Module

It is mercedes part# 006 545 74 32, Bosch part # 0 227 400 658. This should fit w126 300SE/SEL 1988-89, 300TE 1988-89,190E 2.6 1989 and w124 300e's1986-92, but as always your best bet is to match up the part number with the one you are trying to replace. "

So 1992 300E and 1992 300CE do not have the same engine? It'd have been big saving .

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1996 E320 since 1/16/08, 171K miles as of Feb 2011

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1989 300CE - R.I.P. Dec 29 2007
Other MBs (sold): 1992 300E-24 - 1979 350SLC - 1984 230E - 1990 300CE