Mercedes Benz

Based on the diagnostic trouble codes (DTCs) you've provided, it is highly likely that there is an issue with your vehicle's oxygen sensing and heating systems. The codes indicate a range of problems, from a simple heating circuit malfunction to a complete system failure affecting the engine's ability to maintain the proper air-fuel ratio.   P1102, P1105, P1107, P1110, P1115, P1117, P1119, P1121: O2 sensor heating These codes all point to a problem with the oxygen sensor's heating circuit. An oxygen sensor's effectiveness depends on it being at a specific temperature to provide accurate exhaust gas readings to the Engine Control Module (ECM). The heater inside the sensor allows it to reach this temperature faster.   Possible causes include: Faulty O2 sensor heater element:  The heating element within the sensor may have failed. Wiring issues:  The wiring or electrical connectors to the sensor's heater circuit could be damaged, corroded, or disconnected. Blown fu...