2012 Mercedes Benz GLK350 Base After Catalytic Converter, Driver And Passenger Si Oxygen Sensor, Engine Designation: 272.991, FI, Naturally Aspirated, GAS, Set Of 2, 4-Wire, 6 Cyl 3.5L
2012 Mercedes Benz GLK350 4Matic After Catalytic Converter, Driver And Passenger Si Oxygen Sensor, Engine Designation: 272.971, Set Of 2, 4-Wire, 6 Cyl 3.5L