Not sure what others think or believe, but over in the MB community,
they all swear by the phosphate-free formula favored by Mercedes. 
Zerex G-05 is the basis of the MB approved formula 
http://www.valvoline.com/pages/products/product_detail.asp?product=10

For some reason, it's become difficult to find as of late.  Curious to
hear if anyone in the VW community has used this stuff.

On 1/1/06, Florian Speier <groups.florian@gmail.com> wrote:
> hi list,
>
> shopping for adequate wbx coolant starts confusing me. shops only seem to
> have the all engines all makes prestone or similar coolant, and when i ask
> if that is phosphate free, i get one of two answers:
> answer a) if it does not say it is phosphate free it contains phosphate.
> answer b) if it says all engines it is fine for aluminum engines and these
> require phosphate free coolant, it follows that the coolant is phosphate
> free.
>
> so, which is correct? or, if we dont know the answer, can someone just tell
> me a brand that is safe to use and available at schuck�s, walmart or the
> like?

Casey
Olympia, WA
Biodiesel: "I drive in a persistent vegetative state"
'87 300TD intercooler (211k)
'84 300D (207k)
Gashuffer:
'89 Vanagon Wolfsburg Edition (186K)