Mixing Mercedes blue coolant with Zerex G05?
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w212
Mixing Mercedes blue coolant with Zerex G05?
I read somewhere that zerex G05 was the right stuff, but my local mechanic said you should not mix the two because they’re different colors? Who’s right? This is for a 2014 E350.
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w212
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W212 MY'14 M276-3.5NA @75kMi
(just know that these really are the same. MB did not use Blue for very long before switching again for some reasons.... so I stick with G05 they had for the longest time!)
Either way, your cool8ng system is safe.
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w212
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From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
Coolant leak... good > better > great
-1. Yes, exactly 100%: G05<=>G48
Don't take my word, compare the specs.
[The one thing you NEVER want to use is TAP WATER because the electrolytes will eat holes in the radiator!]
-2. While you're there do a good job....
Renew the old coolant with a simple "drain & fill".
--> Cost you $20 + 30mn free time.
-3. The standard coolant leak is the 5¢ O-Ring seal for the hose to the expansion tank. Available at your favorite OEM parts distributor.
Then your cooling system will be trouble free - Enjoy!
Last edited by CaliBenzDriver; Jun 1, 2022 at 05:38 PM.
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2016 E400
To continue the coolant thread, I just dumped the coolant out of my recently purchased 08 ML320 CDI. It was straw colored, likely the original G05 that was used by MB up until about 2012 if my research is correct.
BEVO now advises to use G48. I read an MB document on this forum dated 2012 that advised the G05 was being replaced with G48 when sold from the parts department and no compatibility issues reported.
I have both G05 an G48 Zerex brand in my shop. Draining the ML produced about 7l of coolant, so approximately 2.5l remained in the system.
I was prepared to refill with G48 when I was sucked into the vortex of doubt......
I called the tech line at Valvoline and spoke to a tech (presumably, he seemed very knowledgeable discussing chemical compositions) and asked him if there were any "issues" refilling the system with G48 when some G05 remained in the system and he suggested that I use G05 unless I was prepared to flush out the system of the old G05 completely. He said there wouldn't be any issues but he never recommends mixing chemical compositions.
So I refilled it with fresh G05.....
BEVO now advises to use G48. I read an MB document on this forum dated 2012 that advised the G05 was being replaced with G48 when sold from the parts department and no compatibility issues reported.
I have both G05 an G48 Zerex brand in my shop. Draining the ML produced about 7l of coolant, so approximately 2.5l remained in the system.
I was prepared to refill with G48 when I was sucked into the vortex of doubt......
I called the tech line at Valvoline and spoke to a tech (presumably, he seemed very knowledgeable discussing chemical compositions) and asked him if there were any "issues" refilling the system with G48 when some G05 remained in the system and he suggested that I use G05 unless I was prepared to flush out the system of the old G05 completely. He said there wouldn't be any issues but he never recommends mixing chemical compositions.
So I refilled it with fresh G05.....
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Mercedes gl450
You strike me like someone who likes to know, right?
-1. Yes, exactly 100%: G05<=>G48
Don't take my word, compare the specs.
[The one thing you NEVER want to use is TAP WATER because the electrolytes will eat holes in the radiator!]
-2. While you're there do a good job....
Renew the old coolant with a simple "drain & fill".
--> Cost you $20 + 30mn free time.
-3. The standard coolant leak is the 5¢ O-Ring seal for the hose to the expansion tank. Available at your favorite OEM parts distributor.
Then your cooling system will be trouble free - Enjoy!
-1. Yes, exactly 100%: G05<=>G48
Don't take my word, compare the specs.
[The one thing you NEVER want to use is TAP WATER because the electrolytes will eat holes in the radiator!]
-2. While you're there do a good job....
Renew the old coolant with a simple "drain & fill".
--> Cost you $20 + 30mn free time.
-3. The standard coolant leak is the 5¢ O-Ring seal for the hose to the expansion tank. Available at your favorite OEM parts distributor.
Then your cooling system will be trouble free - Enjoy!
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Posts: 314
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Mercedes gl450
You strike me like someone who likes to know, right?
-1. Yes, exactly 100%: G05<=>G48
Don't take my word, compare the specs.
[The one thing you NEVER want to use is TAP WATER because the electrolytes will eat holes in the radiator!]
-2. While you're there do a good job....
Renew the old coolant with a simple "drain & fill".
--> Cost you $20 + 30mn free time.
-3. The standard coolant leak is the 5¢ O-Ring seal for the hose to the expansion tank. Available at your favorite OEM parts distributor.
Then your cooling system will be trouble free - Enjoy!
-1. Yes, exactly 100%: G05<=>G48
Don't take my word, compare the specs.
[The one thing you NEVER want to use is TAP WATER because the electrolytes will eat holes in the radiator!]
-2. While you're there do a good job....
Renew the old coolant with a simple "drain & fill".
--> Cost you $20 + 30mn free time.
-3. The standard coolant leak is the 5¢ O-Ring seal for the hose to the expansion tank. Available at your favorite OEM parts distributor.
Then your cooling system will be trouble free - Enjoy!
Also, as for #3, the prior owner of my GL crazy glued the hose to the expansion tank nozzle (which looks like it was broken). I changed the expansion tank. Drive a lot in the desert and don't need that hose coming unglued.
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2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
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Mercedes gl450
Unfortunately, I cannot find the link. I believe it was on a specific dealership's website. However, I believe it was in the context of what to do if you get a low coolant warning and the idea was that 50/50 mix with tap water is better than 100% coolant. In any case, I would not be inclined to use San Diego tap water if other alternatives were available. But, that's why I use the prediluted coolants.
