what type of coolant do you use in your benz? - Mercedes-Benz Forum

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post #1 of 5 (permalink) Old 08-12-2008, 10:24 AM Thread Starter
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what type of coolant do you use in your benz?

MB recommends that we use their "special" formula coolant but I can't find it on the shelf. so I recently had to top it off with some Peak 50/50 pre-diluted.

did I do a bad thing?

what do you use?
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post #2 of 5 (permalink) Old 08-12-2008, 10:44 AM
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You have to use MB or Zerex G-05

Some things that can happen if you use the wrong stuff is rust and improper cooling and lubrication.
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post #3 of 5 (permalink) Old 08-12-2008, 07:25 PM
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You're *suppose* to use the MB brand or the Zerex g-05, like Greg mentioned above. The Zerex is cheaper, and I've been told my countless MB folks that mercedes uses the same stuff as Zerex and slaps their label on it.

I did put Peak in my c230 recently, but I plan to replace it with the Zerex soon. Like Greg said too, it can tamper with your system very slightly. I've heard it'll wear out your hoses because it's an incorrect chemical. Things like that. I haven't noticed a temp issue with my car, but I rather be safe than sorry.

You can buy the Zerex at NAPA. You use to be able to get it at Autozone or Pepboys, but I couldn't find it. But NAPA definitely has it. Sorry for the babbling too!

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post #4 of 5 (permalink) Old 08-12-2008, 07:54 PM
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In the US, Valvoline makes the coolant for MBUSA to their specifications. While not molecule for molecule the same as Zerex G-05, the two fluids meet the same G-05 standard for alloy motors.

The Zerex in the gold jug is substantially cheaper than the white jug from the dealer, but you'd be hard pressed to say that one is better than the other.
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post #5 of 5 (permalink) Old 11-12-2008, 11:27 AM
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This is kinds a stupid question, but when you add coolant, how high should you add? Most of cars I owned have a mark on the reservoir indicating the level of coolant should be. But I see no mark, nor did I find it mentioned in the manual. If there is a mark somehow I missed, where is it?
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