Hello
According to the manual the only coolant you are supposed to use is the G 012 A8 D meeting specification TL VW 774D.
The blue is for Audi models 1997 and prior. The red or pink is for 1997 on.
I have attached the information from the manual.
NOTE: " Only use coolant additive G 012 A8 D - meeting specification TL VW 774 D. Identifiable by red color
I have also attached a web site for your review.
https://www.2carpros.com/articles/mitchell1eautorepair-car-repair-manuals
Me, I would have it back to the blue unless they can show you otherwise in documentation and warranty any engine damage. .up to you
Hope this helps.
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Saturday, March 7th, 2009 AT 7:31 PM