X166 M278 fill coolant PDF

A document that provides step-by-step instructions for filling the coolant for certain vehicle engines. It includes visual aids such as diagrams and images to assist with the process. The document outlines specific tools and parts required, including the NTL adapter and vacuum pump, and provides a detailed sequence of steps, from connecting hoses to vacuuming the cooling system and filling it with coolant. Images depict the engine compartment and various tools used in the procedure.