0E0E04 Mercedes Fault Code :
Read the description of 0E0E04 in ACM02T and the engine lights up for ACM02T - Exhaust aftertreatment (17A03) code, there are some possible causes for it.
The power supply of component '17R01 (AdBlueŽ line heater resistance 1)', '17R02 (AdBlueŽ line heater resistance 2)' or '17R03 (AdBlueŽ line heater resistance 3)' has a short circuit to ground.