I have a W3033 which is the same chassis Series 3000, and I know my spider is the aluminum kind, I have the honeycomb drum. Back in the day and maybe on the huge industrial washers they sell they have the steel spiders that are 4 arms not the 3 arms I have and am sure you have the same spider as mine.
It sounds like its either the drum bearings that are going out, or the motor bearings. If you pop the top off, you an take the right side panel off, screws down the back and top, and listen by the motor while spinning and see if that noise happens again from the motor. I bet it's the bearings that are failing.
You have the induction motor so there are no carbon brushes. There is a taco-generator on the back of the motor which could be worn out and making the noise as well. If you can't determine if the noise is from the motor or the drum, you can slip the belt off and run a drain/spin cycle to determine if it's the motor. The clearance between the drum and the drum boot seal is so small that it's very unlikely anything got down in there and is jamming up or interfearing between the inner drum and the outer steel drum.
Here is a thread from my washer's internals to give you an idea, if you need help on how to take the machine apart let me know and I can help. I've had mine apart 3 times in 10 years so I know the steps which are not real obvious... the Germans over-engineer things
I have the Miele service manual for my W3033 and the basic principals of the machines would be very similar if you want I can share that with you as well.
Andrew
https://www.automaticwasher.org/cgi-bin/TD/TD-VIEWTHREAD.cgi?28002