Having had my car for 3 weeks now, I looked into Carista /OBD11 as I want to turn off the Soundaktor. I’m not a fan of loud exhausts especially fake ones.
After some digging, it appears that the 8.5 has additional security - abbreviated to SFD2 (Cybersecurity regs?) which the 3rd party dongles have not yet managed to gain access to.
Some diagnostic functions are available but adaptations are mostly not. Which is a shame as I also wanted to enable rear DRLs as my wife always turns the light switch form auto to off and drives around in the darkness with front lights and no rears. 🫣
I’ve just been out in the car, so had a check for you, the Soundaktor adjustment one click app is available for ten credits in my 8.5 using OBDeleven, no rear DRLs from them yet though. Using Carista however there is the option to turn on rear ‘Scandinavian’ DRLs, so both are possible, but sadly only by using both dongles at present.😩