C400: Coolant change procedure?
04-26-2022, 10:41 PM
#1
Member
Thread Starter
C400: Coolant change procedure?
Has anybody done this DIY? It seems like the MB spec'd procedure is ridiculously complicated for the sake of avoiding air locks (which I admit is admirable...sorta).
Does anyone have a simpler "drain and refill" technique?
Does anyone have a simpler "drain and refill" technique?
04-27-2022, 09:31 AM
#2
Senior Member
havnt done it yet. MB interval is 150k miles. how many you have on the C400?
A few have done the intercooler when upgrading to larger units.
A few have done the intercooler when upgrading to larger units.
04-27-2022, 11:13 AM
#3
Member
Thread Starter
If you go to the manufacturer website of pretty much any pink HOAT coolant, they specify 5 years or 150,000 miles, whichever comes first.
My wife's car has never had the coolant replaced and it's a 2015, so it's overdue, even though it has 93,000 miles.
04-27-2022, 11:24 AM
#4
Senior Member
Change interval isn't *ONLY* mileage based.
If you go to the manufacturer website of pretty much any pink HOAT coolant, they specify 5 years or 150,000 miles, whichever comes first.
My wife's car has never had the coolant replaced and it's a 2015, so it's overdue, even though it has 93,000 miles.
If you go to the manufacturer website of pretty much any pink HOAT coolant, they specify 5 years or 150,000 miles, whichever comes first.
My wife's car has never had the coolant replaced and it's a 2015, so it's overdue, even though it has 93,000 miles.
shows 155k miles or 15 years for c class coolant change. 100k id prob consider changing mine since i want max performance, but im only at 62k so i have some time. The wifes ML has 110k and i dont plan on changing it.
04-27-2022, 06:36 PM
#5
Member
Thread Starter
https://www.mbusa.com/vcm/MB/Digital...nce_manual.pdf
shows 155k miles or 15 years for c class coolant change. 100k id prob consider changing mine since i want max performance, but im only at 62k so i have some time. The wifes ML has 110k and i dont plan on changing it.
shows 155k miles or 15 years for c class coolant change. 100k id prob consider changing mine since i want max performance, but im only at 62k so i have some time. The wifes ML has 110k and i dont plan on changing it.
G-40 coolant is a lot cheaper than a radiator or water pump.
I'll change mine at 5 years like the BEVO authorized fluid makers recommend. Here in Maryland our annual highest and lowest ambient temps have a +90F range so I'd prefer the additive pack and heat transfer/anti-freeze properties be at their optimal level.
