That would be too much. Proper sleeping current loss should be less than 100ma. (0.100A)
But! I think you may be testing the circuit inappropriately. By installing your meter in series I imagine that you disconnected the circuit. After doing this everything resets itself and some control units don't go back to sleep right away.
MB says to test quiessent current flow by mounting a switch between the battery cable and battery, such that when disconnected the only path becomes your series circuit through the ammeter. This circuit allows all control units to stay engaged and allows true testing of the sleep state.
Bosch Master, ASE Master, L1
33 years MB technician