Having driven the Coupe and appreciated that my 90 isn't 100%, I spoke to my friendly local garage (who are German specialists and have a good depth of knowledge)
They've suggested having the metering head and pressure regulator overhauled by KMI in Welwyn Garden City.
Now, here comes the rub. They can service both, they'll come back as new but it's north of £600 to do both.
Researching the subject brought up this lot
https://www.ebay.co.uk/itm/Audi-Quat...QAAOSwRLZUIty-
who do kits for both the head and the regulator.
Anybody any relevant experience of them or this subject?
I should add that Colin has very generously offered me a known good set to swap over and see if it improves the situation at all and I'll do this prior to splurging in any way!
