EXHAUST GAS NOX SENSOR / BEFORE THE CATALYTIC CONVERTER / MERCEDES ACTROS EURO 6; EXHAUST GAS NOX SENSOR / BEFORE THE CATALYTIC CONVERTER / MERCEDES ATEGO EURO6; NOTE!!! A CONDITION FOR ACCEPTANCE OF THE NOX SENSOR FOR CONSIDERATION OF THE COMPLAINT IS TO ATTACH A PRINTOUT WITH ERROR CODES FROM THE DIAGNOSTIC COMPUTER AND CONFIRMATION OF CLEANING OF THE SCR SYSTEM.