Mercedes-Benz CLS C219 Oxygen Sensor 15400517/0258006272 Direct Fit

This oxygen sensor is designed for the Mercedes-Benz CLS-C219 series (2004–2010) including CLS 350, CLS 500 and CLS 55 AMG engines (3.5L, 5.0L, 5.5L). Core function is real-time monitoring of exhaust oxygen content and feedback to ECU to adjust air–fuel ratio for efficient combustion and lower emissions. OEM numbers 15400517 and 0258006272; direct replacement, no modification needed. Installation difficulty medium; use a dedicated socket, avoid thread damage; engine must be cooled before replacement. For B2B buyers, this sensor has broad compatibility and quick turnover, especially suitable for repair shops to stock for CLS series common idle issues or high fuel consumption.