Mercedes-Benz Mercedes C-Class 2021-present Emissions & Sensors Specifications

The emissions sensors for the 2021-Present Mercedes C-Class are designed to be compatible with all trim levels and engine configurations within this model range. These sensors meet Euro 6d and other global emissions standards. However, it is recommended to verify compatibility using your vehicle’s VIN or consult the manufacturer’s technical specifications to ensure proper integration.

The emissions sensors require minimal maintenance but should be inspected during routine service intervals. Check for contamination, physical damage, or error codes during diagnostics. Cleaning the sensors with approved solutions can help maintain accuracy. Replace sensors as recommended by the manufacturer or if fault codes indicate sensor failure, typically every 60,000-80,000 miles.

To replace the emissions sensors, first, locate the sensors in the exhaust system. Disconnect the electrical connector and use a wrench to remove the sensor. Install the new sensor by hand-tightening, then torque to the manufacturer’s specification (typically 25-30 Nm). Reconnect the electrical connector and clear any error codes using a diagnostic tool to complete the process.

If the emissions sensor warning light activates, use an OBD-II scanner to retrieve fault codes. Common issues include sensor contamination, wiring damage, or exhaust leaks. Clean or replace the sensor as needed, and ensure all connections are secure. If the issue persists, consult a certified technician for further diagnostics and repair.

To optimize performance, ensure the sensors are free from contamination and securely installed. Use high-quality fuel and adhere to regular maintenance schedules. Avoid driving with a malfunctioning engine, as it can damage the sensors. Periodically check for software updates from Mercedes-Benz to ensure the sensors operate with the latest calibration.