User feedback:
Add a spare key to Audi TT 2016 with Xhorse VVDI MLB Tool + VVDI2.
Virtual cockpit.
Its not MLB key its mqb48. It looks like an MLB key but its not.
Obtain key data with MLB Tool + MQB48 adapter from working key.
Then learn key with VVDI2.
Tool used:
A new MLB key