bosch o2 oxygen sensor? how to install?

I bought a generic bosch 4-wire o2 sensor for my c220. My original o2 sensor just has 2 wires going to the sensor. a brown and green. the replacement has 4. What do i do with the other wires on the replacement and which are which ?????

Please help with this? How do i install this thing?

Thanks

you got the wrong parts it have the heater at the 4 wire one . make sure you can get the 2 wire one .when you buy you have to mention about how many wire and the color.bosch have the right o2 sensor haness for mercedes .so why you need to cut the wires????