My mechanic uses a vaccum system. He builds up vaccum pressure, and suks it out through the resevoir. He then disposes of the coolant, and refills his vaccum systemw ith fresh properly mixed mercedes coolant.
He then creates a vaccum in the cooling system, and released and the new coolant is sucked into the car.
'92 300CE - Sold
2004 C240 - C7 Wheels
2015 ML350 - P1, Pano, Ash poplar wood, Sport Dinamica interior, Running Boards Keyless go.