Mercedes-Benz R Series Oxygen Sensor 0015400717/0258006318 OEM Specification Replacement

When Mercedes R-series experiences rough idle, high fuel consumption, or engine fault lights frequently, aging or failure of the oxygen sensor is likely. The sensor monitors exhaust oxygen content and feeds ECU to precisely control injection, ensuring efficient combustion and compliant emissions. Replacement uses OEM-spec parts, OEM numbers 0015400717/0258006318; fits R300/R320/R350 series. Install with engine cold; use dedicated socket to remove old sensor carefully to avoid damaging threads; apply anti-sieze to new part and tighten to standard torque to prevent leaks or signal issues.