An insight is only possible for a fee (90 ), and
a written explanation of why you want to view patent files.
After that, DPMA decides whether to patroll the patentee owner to ask him if they can access the patent data. Eventually a part of the 90 euro will be refunded afterwards.
Or you take the easy way and clear everything directly with the patente owner
Should we just cough up the 90 Euro and get that insight as soon as possible? I'd put my hand up to pay some of the 90 Euro and write the explanation.