O2 sensor - Two Part Numbers??
16272
A0015400517
Both Bosch, both genuine MB. I even have a box in front of me with the 16272 sticker over the top of the other more conventional part number.
the O2 in the box has A0015400517 stamped on it. Connector is factory.
Can I assume the parts are identical, and perhaps simply a new numbering format?
The part also is stamped 272/273, but not 16272



