You'll have a drain plug on the block, If I remember correctly, under the exhaust header. Another drain plug on the bottom of the radiator, on the right side underneath.
I'm not sure on the capacity of the cooling system on the M103, but asuming the total capacity is around 9-10 litres, a gallon should be fine.
Quote:
Originally Posted by 86560SEL
My MB has the green stuff in it and I am going to change it here at home. I am going to get the Zerex coolant.
Do I just need to simply drain the radiator, then refill with the Zerex? Not sure how to flush it myself, unless I just leave the drain out and pour some water through it to get out as much as I can?
Also, I live in an area where it dont get below 5°, even in the harshest cold weather outbreaks... would one gallon be enough, then then refill the rest of the way with distilled water? (BTW, its a W126 with the M103 engine).
Thanks.
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