Xhorse VVDI MLB Tool and KYDZ MLB Tool will only add key to VW Audi Porsche Bentley Lamborghini MLB system. If all keys have lost, you only can do with OEM key with ODIS online access.
OEM key is usually around $400-500 and takes 1-2 weeks to show up. ODIS subscription is expensive, $1000ish per brand per year. There are many challenges with buying subscriptions. The biggest one is trying to justify the cost. It’s also challenging to get going and keep it up to date.
You also need a good interface that is compatible with ODIS subscription. Either 6154 original or the good clones (VNCI 6154A or the VXDIAG VCX SE 6154). VNCI 6154 red dongle has positive reviews and allows modifying the serial number to the original 6154 dongle. Users have zero issues with keyed ignition cars using VNCI interface with ODIS online.
Better set up ODIS on a dedicated laptop. Better not set it up with other OEM software. They will interfere with each other and not allow either to work.
Here is an example of programming 2017 Audi Q7 MLB all keys lost using OEM key+ ODIS online access:
