981303 Mercedes Fault Code :
Read the description of 981303 in ACM2TuEURO and the engine lights up for ACM2TuEURO TuEURO Aftertreatment Control Module code, there are some possible causes for it.
The power supply for components 17B16: Nitrogen oxide (NOx) sensor before Selective Catalytic Reduction and (or) 17Y02: AdBlue tank heater valve has a short circuit to positive.