0F0E03 Mercedes Fault Code :
Read the description of 0F0E03 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 '17R03 (AdBlueŽ line heater resistance 3)', '17R01 (AdBlueŽ line heater resistance 1)' or '17R02 (AdBlueŽ line heater resistance 2)' has a short circuit to positive.