VVDI MB Tool V3.0.0 version newly can support BGA password calculation: bugfix for lost all key W216, W164 2009-.
Mercedes-Benz W221 is Motorola EIS, about all key lost, vvdi mb bga tool key programmer cannot support online calculation get password directly. Password calculation can get key password through EIS and but need at least one working key (online), incl. W164, W164 (2009-), W166 W197 W212 W218 W246, W169 W209 W211, W172 W204 W207, W216, W221, W639 (2009-)
To add new keys to W221 when it lost all keys, you can do like this:
remove W221 EIS,
get eeprom by programmer (such as VVDI PROG),
then load eeprom to VVDI MB TOOL to prepare key file,
write key and insert to EIS for key learn.
In W221, there was only “DUSSELDORF” on the MCU (“DUSSELDORF”—-NEC chip)
Maybe only parts of W221 is Motorola EIS, you can see the attachment photo its Motorola EIS.
anyway, about W211 all key lost you can change a new EIS do you work.
read all key lost EIS data, then write to new EIS (enter password at random/as you want) then prepare key file with the enter password.
Note: VVDI MB BGA Tool v3.0.0 now can only program new keys to Mercedes W212 W246 W204 W207 W216 W164 when they lost all keys.