Coolant fluid replacement question
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Super Member
Joined: May 2003
Posts: 968
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From: Long Island, New York
2018 E400 4matic Wagon
Coolant fluid replacement question
I didn't see anything in the service requirements regarding coolant fluid replacement. In my Jaguar (which I no longer have), the coolant was required to be flushed when the car was 10 years old, regardless of mileage. And the replacement anti-freeze had to meet certain specs. For the E class, it doesn't seem to require a coolant flush. Does this mean that you never have to do a coolant flush?
MBWorld Fanatic!
Joined: May 2012
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From: Pepper Pike Ohio
24 GLS580 '23 E450 4matic 12 E350 4Matic
I didn't get far enough in the 213 manual yet to find it, but my 212"s i did every 60K miles, I believe that manual says at 100K, for them
Last edited by pierrejoliat; Mar 29, 2026 at 05:26 PM.
Junior Member
Joined: Feb 2026
Posts: 16
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From: Ohio
2017 E400 Wagon-Renntech ECU tune
Zerex G30 says to refer to your owners manual for change interval. However, the Zerex technical document notes the product is shelf stable for 5 years (not sure how that differs from use life.) I personally change all coolant every 5 years but there's usually another reason to drain it, e.g. coolant pump swap, disconnecting lines for other repairs, etc.
