VW ID.3 1st Edition & Tesla M3 LR
How much did they charge you for the filter? As far as I’m aware, the DQ400 does not have a filter that can be changed without dropping the gearbox.My GTE had the filter changed when the oil was serviced; it was part of the specification.
I also had plugs changed but yes as you describe mostly unnecessary for a car used on EV all the time.
I believe it’s designed to last the design life of the vehicle.