Re: miele w304
It’s dead simple. There will be one (new) or three (old) 10mm head bolts around door seal which come out. Then a screw or two each side at base of panel and/or a rusty awkwardly tight clip just below the filter. On old models take out soap drawer and remove screws behind. The front panel will then swing open (or lift away on newer models, like it would on a Bosch). And all will be revealed. Probably will all be down to the door seal being damaged by zips etc pulled across the lip.
Hope that made sense.
Mike.