I was researching for the rear 02 sensor replacement on my 1994 Mercedes E320 wagon. I came across this universal 02 sensor as describe on ebay: https://www.ebay.com/itm/New-O2-02-Oxygen-Sensor-Universal-4-Wires-For-Lexus-Acura-Honda-Isuzu-GMC-SG450/261706342710?fits=Year%3A1994%7CModel%3AE320%7CSubmodel%3ABase%7CEngine+-+Liter_Display%3A3.2L%7CMake%3AMercedes-Benz%7CTrim%3ABase+Wagon+4-Door%7CEngine%3A3.2L+3199CC+l6+GAS+DOHC+Naturally+Aspirated&hash=item3ceee9e136:g:nF4AAMXQMTlRb4u2#vi-ilComp

There are four wires on the 02 sensor (see picture on ebay) One black, one gray, and two white wires. When I looked at my old 02 sensor, it has the same color types as the universal 02 sensor. My question is the two whites wires on both the 02 sensors are both the same and does not matter which white wire connected to the rest of the wiring of 02 sensor on my Mercedes as long as the matching color is white? Any comments, feedback/advice is greatly appreciated.