I had 2019 Tarraco 2.0l 190 bhp 4wd Lux. And it too had all those problems and more – display going blank while driving, windows opening overnight, electric boot opening and randomly unlocking, lane control randomly working, SOS lights on, Ad blue sensor faulty and more.
The RAC inspected the found several error codes which they sent in a report to the dealer whom then claimed they couldn’t find the faults. SEAT UK naturally sided with the dealers despite the evidence
I suffered for 2.5 years going in and out of the dealers the final straw was when the car was in a dealer for 3 continuous months before MB said enough was enough.
I have been in a hire car since August and it has been a battle to get a suitable sized vehicle. I am now in Merc GLB not ideal, but good enough for now until the replacement comes