Quote:
Originally posted by Ethan
when I do a coolant change on my 1998 C230 with automatic climate control - should I simply keep my settings on automatic mode when I turn the car off snd keep it there when I do the coolant change.
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Before changing coolant, drive the car with heat and defroster full on. Leave it that way until after you've changed the coolant. Then run the engine that way again to make sure the coolant is circulated and you get any air out of the system.
Check the coolant level the next morning after changing it and top up if needed. Then set the HVAC back on Auto and the temp back to normal.