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1996 S600 Coupe
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283 Posts
Discussion Starter #1
Hello, I have a vehicle from another make.. it calls for a "HOAT" coolant Zerex G-05.
Someone said that Zerex G-05 is compatible with MB 325.0. Since Zerex G-05 is not sold where I live, I wonder if I can use MB 325.0 for both my vehicles ?!
 

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1995 Mercedes S420, 1995 SL320, 2000 Land Rover Discovery II, 1985 Lotus Turbo Esprit
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1,802 Posts
I don't see any reason why it wouldn't be backwards compatible.
 

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Registered
1996 S600 Coupe
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283 Posts
Discussion Starter #3
Do you know if MB 325.0 is in fact a HOAT coolant? I can not find definitive answers to that.
 

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600 coupe, one of the very first built
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354 Posts
Do you know if MB 325.0 is in fact a HOAT coolant? I can not find definitive answers to that.
I think I downloaded this article from BW, but don't remember the thread. Anyhow, it is attached and hopefully will answer your questions.

I personally believe that if one is religious about changing coolant on a regular basis (and most importantly, does NOT mix brands), any modern antifreeze will be fine.
 

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Premium Member
'97 CL600
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2,965 Posts
Depending on your local climate, I use 70% distilled water and 30% Benz coolant but then I never see temps below 32F.
 

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Registered
1996 S600 Coupe
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283 Posts
Discussion Starter #6
Thanks TimeCapsule and others! No shortage of information on this website.
My concern is corrosion in the cooling system. Distilled water is a must for me , but choosing the right coolant is not so easy.
 

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Premium Member
1999 S600 & 1999 S500
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928 Posts
I also use the MB coolant and use a 50/50 mix. I haven't been using distilled water, but I do use the filtered water from the fridge.
 

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1995 Mercedes S420, 1995 SL320, 2000 Land Rover Discovery II, 1985 Lotus Turbo Esprit
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1,802 Posts
You don't really need to use 50/50 unless you see severely low temperatures, like below zero fahrenheit on a regular basis. 70/30 is fine for most people; 50/50 is just the standard because it's an easy measurement and it's better to be safe than sorry. Most people would just rather not even think about it, so the standard is to give more than enough of a margin of protection. But if you keep up with your maintenance and are diligent about changing fluids and know what kinds of temperatures your region gets, you can dial in the mixture for optimum efficiency -- if you're so inclined.
 
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