Mercedes-Benz W463 C216 Oxygen Sensor A0085423018 0258017283 High-Precision Detection

This replacement part matches OEM standards in material and workmanship, using high-temperature ceramic and dual protective layers to resist thermal shock and chemical corrosion from the exhaust. Measured lifespan is comparable to original, but with more controllable cost. OEM numbers A0085423018 and 0258017283, compatible with Mercedes-Benz W463 and C216 models, including ML, GL, R-Class and S-Class equipped with M272/M273 engines. Functionally, it performs high-precision oxygen concentration detection to feed real-time air-fuel ratio signals to the ECU, ensuring combustion efficiency and emissions compliance. Installation difficulty is moderate; requires a specialized socket for removal, recommended with the engine cold to avoid thread damage; experienced technicians can complete in about 20 minutes.