renewing coolant on e320 2001
 

how is it done? is there a particular hose I can unclip to let the old coolant out? anything else I need to know? thanks.

Don't know precisely for a e320 >> but there should be a petcock/valve on the bottom of the radiator that will drain the radiator and most of the system. There should be a special bolt on the engine case that drains the coolant in the engine block.

I will try to have another look under the car, especially for the engine block coolant drain plug, I did not know such a thing exists.

Although I suppose I can simply drain the radiator, refill, run the engine, drain again a few times?