EA is not an unambigous abbreviation. In various MB literature it can mean engine actuator, electrohydraulic actuator, electronic accelerator, etc. EA / electronic accelerator isn't a single part, it's a system including the EA actuator and the EA control unit. You have the part number for the actuator from post #16. The part number for the control unit is 124 545 01 32. But still it's hard to know how Brabus may have altered your car.