NGK direct-fit oxygen sensor for 2002–2005 Mercedes-Benz C230. Oxygen sensors supply continuous closed-loop feedback to the engine control unit to help maintain engine performance, improve fuel economy and reduce emissions by regulating the air–fuel ratio and alerting OBDII systems to fuel delivery or catalytic converter concerns. This sensor uses an advanced ceramic element with a 3-stage contaminant-resistant plasma-jet and deposit-trap overcoat to resist element poisoning.
NGK Mercedes-Benz C230 2005-2002 Direct Fit Oxygen Sensor