Good morning everyone, new to the forum so please be patient. Lol
I own a 2017 (66 plate) A4 avant ultra sport and over the last 3 months ive been loosing coolant. Ive had the system pressure tested and there is no leaks anywhere. There is also no sign off creamy mixture in the oil, so my question is what else could it be, ive replaced the expansion tank cap but within 2 week its gone from max level to a warning last night coming up. Any advice will be welcome.
Steve