Mercedes Benz E-class W212 Sedan year 2015 central gateway coding by using Auro OtoSys IM600 multi-function tool.
Auto detect vehicle information
Select Central gateway->Coding->Display of coding data
Auro OtoSys IM600 shows E212 gateway over 90 coding options
http://www.obdii365.com/wholesale/auro-otosys-im600-key-programmer.html
http://auro-otosys.blogspot.com/2018/03/auro-otosys-im600-benz-w212-2015-gateway-coding.html