2006 MMI Problems
 

Just picked up my 2006 (UK) A8 4.0 TDi Sport today and have a couple of issues with the MMI.

There are some existing Users setup but I am unable to delete them as they have set their own pin. I tried the MMI reset, but no joy. Any ideas? Also, a bit more worryingly, I created a new User and have tried to update settings and I get the generic "System Error". Is this something that can be fixed by a hard reset (if such a thing exists) or firmware update?