merc w204

[sagie1zn]

normally do eis and cluster direct but w204 has obd option. change and car start and new km show, but as usual eis read 1.6 mil with diag tool. long story short first time user ori avdi, i save data and coding, virginise eis, write same data and coding (which i was told is wrong cause it will write the same ori km) and now key not recognised. i can start the car by emulating key but:
1) how do i make the two original keys work again.
2) what is the procedure after virginising eis, what to write back so it stays at 0 or take cluster km.

the options on avdi are read all the key data, paassword, coding, etc but what do i write back to make it all work again with ori keys. thanks in advance for advice