radiator flush? - Mercedes-Benz Forum
 
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#1 (permalink) Old 12-24-2010, 03:36 PM
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radiator flush?

Hello 140 section, i need to flush the radiator in my sisters s320 1995. Knowing mercedes, there is probably some complication with this. After searching, I didn't find much so... what should I look out for? How much coolant/antifreeze is needed exactly? What coolant/antifreeze is needed exactly (yes there are a few different kinds... i think). Any help is greatly appreciated since oilstop wants like $50 bucks to do it... and im cheap.



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#2 (permalink) Old 12-24-2010, 03:48 PM
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There is only one coolant for all mercedes, buy it from Merc dealer or from online sales who stock the mercedes product (around $23 for 4 ltr plus delivery). Normal mix is 50/50 coolant to distilled water and this should last for 3 years for temps above -30 deg c. I think for the S320 there is a valve at bottom of radiator to drain otherwise disconnect bottom hose. A good shop will do a pressure test and a back flush to clean any scale. If you have been using the MB coolant there should not be any scale. The capacity is usually around 11ltr and around 6 ltr for exchange. The price you have been quoted seems cheap and I suspect it is a quick drain and refill with non genuine coolant that will need to replaced in 1 to 2 years. If you want accurate info on DIY post vin and I can provide data for your car from WIS system.
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#3 (permalink) Old 12-25-2010, 10:17 AM
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In USA only MB or Zerex G05 nothing else is approved.

You will need about one gallon and a half, mixed with water 50/50
After draining flushing etc.

I drain fill with water, drive.. after a few days I drain again refill it.
Put the antifreeze first in, then add the water.

That is if where you are the temperature is not freezing.

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#4 (permalink) Old 12-26-2010, 12:14 PM
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Originally Posted by Hypnotismo View Post
Hello 140 section, i need to flush the radiator in my sisters s320 1995. Knowing mercedes, there is probably some complication with this. After searching, I didn't find much so... what should I look out for? How much coolant/antifreeze is needed exactly? What coolant/antifreeze is needed exactly (yes there are a few different kinds... i think). Any help is greatly appreciated since oilstop wants like $50 bucks to do it... and im cheap.
here you go

its $20-ish from the stealer

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