Hi it was the no clue what to do statement that worried me, I quote the case of a couple of weeks ago when topping up my adblue outside my local Halfords when a guy approached me with the question, where are you putting your adblue as he explained he was just about to stick it in the diesel tank.
Ive never seen this on a A6 C6 or any other Audi. I'd definitely say something isn't aligned right.
My advice would be to get a second opinion with a body shop, mechanic or even Audi.
Hi Yara is not discontinued it just morphed into Halfords own brand, two 5ltr pouches for £20 the clue is on the packaging where it says made by YARA in small letters at the back of it with their viking logo.