Originally Posted by
harbor
I bet this was the factory fill :
Pentosin - Antifreeze
I flushed mine for the 1st time a little over a year ago and a blue colored coolant was in the radiator as the orig fluid.
This is the original coolant used in our cars:
OEM Mercedes-Benz Coolant (blue)
OE Part Number: Q1030004 (replaces older Q1030002)
M/B states that the OEM fluid should never be mixed with any other fluid, which would make me leary of using Zerex G05, unless you do a very thorough flush.
Mercedes Benz ANTICORROSIO - Q1030004
Q1030004.jpg