Hello Experts,

I have an 2002 e320 wagon 4matic. Recently changed the thermostat. When I removed the tstat, about 1 gallon of coolant came out. Refilled from the excess tank. Now I can hear the coolant sloshing around when the engine is running. I believe it is because there is still air in the cooling system. How do I get rid of the air? Thank you for the help.

 

BTW, the excess tank is still full.

 

Just open the clamp on the upper hose a bit and let it seep out some coolant.Or wait until the engine is cooled off completely and let the system sit with the coolant tank cap off for a few hours.Always be careful working around a hot radiator.