Mr. Dalton is the expert here but I'll share my experience.

1995 E320, 104992 motor:
I spliced in a universal type O2 sensor. (Bosch part number 15718) Installed about a year ago, no CEL issues. Before using this sensor, I had a discussion with a tech rep from Bosch. He said that there was no difference in the O2 sensing function of the OEM part vs the universal, but that there are sometimes differences in the heating element current draw. He said that on newer cars the difference in heating current draw between an OEM and universal could sometimes trip a CEL. For what its worth, the MB sensor that I replaced was made by Bosch but had an MB part number. MB part number was 000 540 3817. There were also a bunch of Bosch numbers--I wish now that I had tried to cross reference these with the Bosch rep..... The Bosch numbers were LSH 6 12 V 0 258 003 314/315 470241

J. M. van Swaay