Mercedes-Benz CLS Oxygen Sensor 0015407617 0258006328 OEM Replacement

This oxygen sensor for 2011-2017 Mercedes-Benz CLS (W212 chassis) with 3.5L V6 (M276) and 4.7L V8 (M278) as well as 2012-2016 Mercedes E-Class (W212) same displacement versions; monitors exhaust oxygen content in real time and feeds ECU to adjust air-fuel ratio for efficient combustion and reduced emissions. OEM 0015407617; cross-reference 0258006328; replacement difficulty: medium; use professional oxygen sensor socket to avoid thread damage; apply anti-seize and ensure wiring not tangled. OEM alternative; high-precision ceramic element; fast response; extended catalytic life; bulk purchases for shops or fleets.