3 Wire Direct Fit Lambda Oxygen Sensor - Regulating (Front Pre Cat). Mercedes S Class (1987-1991). Equivalent to Part Numbers: OE: 0075423217, OE: A0075423217, BERU: OZH142, BOS…. If you order before 12PM we'll dispatch same day from our UK warehouse. For guaranteed next day delivery please select this option at checkout. This product comes with free 365-day no quibble returns (UK only).