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coolant: which one?

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dcashour's picture
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A few months ago I bought a gallon of Zerex G-05 coolant, which is approved for use in all Mercedes vehicles. This past weekend, when I planned to do a coolant change, I could not find the same product. Nearly everything on the shelf is the pre-mixed variety, except for some lesser brands which are not compatible with Mercedes. I went to four different auto parts stores, and found the same thing.

I've gone to Valvoline's (maker of Zerex) website and cannot find anything other that the G-05. All of their pre-mixed (50% coolant/50% water) products do not specifically say that they're approved for Mercedes.

The coolant capacity for my car is 9 litres; I already have a 1/2 gal of the Zerex, so I only need a gallon. Should I just go to the dealer and buy the Mercedes coolant, or does anyone know if any of these premixed brands will work?

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Dave

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dcashour wrote:
A few months ago I bought a gallon of Zerex G-05 coolant, which is approved for use in all Mercedes vehicles. This past weekend, when I planned to do a coolant change, I could not find the same product. Nearly everything on the shelf is the pre-mixed variety, except for some lesser brands which are not compatible with Mercedes. I went to four different auto parts stores, and found the same thing.

I've gone to Valvoline's (maker of Zerex) website and cannot find anything other that the G-05. All of their pre-mixed (50% coolant/50% water) products do not specifically say that they're approved for Mercedes.

The coolant capacity for my car is 9 litres; I already have a 1/2 gal of the Zerex, so I only need a gallon. Should I just go to the dealer and buy the Mercedes coolant, or does anyone know if any of these premixed brands will work?

i personally only use the mercedes coolant, and i recommend you do the same.
far superior to any othe coolant i have used or put in my customers cars.

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dcashour's picture
Belmar, NJ
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1983 240D
1999 E300 Turbo Diesel

I checked their website for Valvoline dealers, but many on the list no longer sell the unmixed 100% Zerex G-05 (only the 50/50 stuff). These are stores like Pep Boys, Strauss and Auto Zone, as well as some smaller, independent auto parts stores. I know I can get it at the MB dealer, so I'll just do that. Thanks all for your help.

Another question: once I drain the old coolant, I plan to reconnect the hoses and flush the system once with water. Do you recommend using any of the aftermarket "flushes" or "cleaners", or will the water flush be adequate? The car has 85000 miles, and I don't know when the coolant was last changed.

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Dave

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coolant question again

yesterday iwent looking for coolant on my 84 300D TD, I came across a PRESTON DEX-COOL ANTIFREEZE COOLANT that the label states, recommended for GM VEHICLES AND OTHER LIGHT DUTY TRUCKS WITH ALUMINUM RADIATOR. also it was stated as MEETS specification requierments of DAIMLER CHRYSLER MS-7170 AND MS-9769, its silicate and phosphate free as stated on the label. the color is like orange red, i was wondering if this is compatible or SAFE to use in my car since i already drain the old green colored juice from the radiator AND FILLED it up with this stuff, SHALL I DRAIN IT OR NOT??? car is parked , not driven till i got any comment about this.

THANK YOU VERY MUCH !!
:confused:

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dcashour's picture
Belmar, NJ
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1999 E300 Turbo Diesel

I ended up buying the genuine MB coolant from the MB dealer for about $20. It's more of a yellow color. I don't have the MS-XXXX specifications so I don't want to tell you either way. I figured I was saving about $100 by doing it myself, so I decided to buy the real McCoy. I was going crazy looking in all the auto parts stores for the correct coolant. Many of them say the same thing on the label: "meets or exceeds Chrysler, Ford..." My wife's VW gasser uses the pink stuff, but I don't know if it's ok for MB cars.

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I can't believe the anti-freeze mfrs are selling "pre-mixed" coolant. Doesn't that mean that you're paying the same price for HALF the product?

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peeyups's picture
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Where to, buy Zerex G 05

I asked the question at the Valvoline web site and they told me to get it at the local NAPA dealer. The one I went to in central Jersey had it in stock. I just bought two gallons for a total of $ 21. Hope this helps

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I have always been a diehard MB coolant fan.

Do you have a plastic radiator?

have you eve rhad the neck break?

the coolant was green, WASN'T IT?

hehehe. The MB coolant also contains a preservative for the plastic. how do i know this?

well, according to my observations, Mercedes that have had the proper coolant will not suffer from softening of the radiator top in the long run. The top does not become scored, fragile or brittle.

mercedes without the proper coolant, well, have you ever seen the neck break? the plastic became brittle.

One Item, also, ids the presence of the corrosion inhibitor in the MB coolant. this keeps aluminum parts clean, and unpitted.

Also, as a rule, whejn flushing coolant, always top off with DISTILLED WATER.

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Pierre Hedary
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Thats correct..... 100%, not pre-mixed

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