How to clean this kind of commercial carpet?

[Lounge Lizards]

Hi Bernd,
I'm not sure, but that looks like a very coarse indoor/outdoor carpet that we see in boats, (& also in SOME chemist shops ).

I would use the CRB, or a 175 with BRUSH, preferably to pads.

I've found that the pads get ripped up pretty quickly, leaving behind small pieces of pad, compared to normal carpet plus the brushes actually appear do a better job.

DS or Punch is  the product I would use.

I would also boost it with Chemox for the spots if they are coffee, etc;