1 gallon container to be mixed in equal parts with water
This is the newest formulation, MB part Q 1 03 0004 and is blue in color. It supersedes the previous coolants (Q 1 03 0002), which were either pink or yellow in color. These two earlier fluids are not compatible with the blue fluid. A complete coolant flush and replacement is required, as the previous fluids have been discontinued. Do NOT mix the two different fluids together.