Hello Chris,
Did you get the battery checked after?
Re. Stop/start - Is it important to you that this system works, from an environmental point of view - or simply that ‘if it’s fitted it should work’?
Obviously if it’s the former, then I must respect your views. If it’s the latter, then my view is that it’s an engineering averse system ,and you are far better off without it. Maximum wear occurs on start up, and of course the additional wear on starter motor and battery is accelerated.
For that reason, I have to remember to disable it on our non-Audi, every time I get in it!
Kind regards,
Gareth.