MERCEDES ESL EMULATOR THINGS TO KNOW BEFORE YOU BUY

My question is will we really need to just take it for the supplier or will we be able to use you sections and all will work Okay right after putting in you esl sort pelican sections Followup from the Pelican Personnel:howdy I am getting the same trouble with my 2011 w204 [c300 Activity 4matic] I altered the battery yesterday and drove the vehicle