O2 Sensors & Water Leak PDF

A service bulletin addressing check engine light issues for Mercedes-Benz models ML320 and ML430 from the 1999 model year. The document provides guidance on identifying and repairing corrosion in the rear oxygen sensor connectors due to water leaks. It includes instructions for cleaning, sealing, and replacing sensors and terminals if needed. A list of parts and sealant specifications is also provided to ensure proper repair.