I bought a VVDI MB BGA tool key programmer with software 2.0.8 from vvdishop.com.
I need to program key on W204 under all keys lost situation. But failed, other Mercedes models work without problem. I made a refund request on the dealer. While two weeks later, the salesgirl sent me 2.1.0 software link saying is able to read W204 ESL correctly.
I updated my Benz BAG device and tested it again. This time it works! I bought 2 tokens later.