Look at following pictures which show some important procedure on how to replace ELV simulator with vvdi mb tool + MB EIS Test platform when Benz GLK ESL damage.
Tools to use:
http://www.uobdii.com/wholesale/xhorse-vvdi-mb-bga-tool.html
MB EIS Test platform
http://www.uobdii.com/wholesale/mb-eis-test-platform.html
Benz model for example:
Benz GLK 350
Procedure (with couple of pictures)