Never got to a second dealer, they wanted £106 for a “non-warranty” inspection!!
I have the dates and emails for the original return to the supplying dealer etc.
We’ll see how it goes from here. I can always live with it for the next 3 years if I have to. The Ateca wasn’t bad, I had thought of adding an under-seat sub to that but didn’t bother. I think I’m just rather P’d off that a £600-£800 upgrade makes so little difference to the sound quality.
Please excuse spelling/typos. Apart from being a clot it turns out I had one on my cerebellum that's now causing various problems!