I got a reply today, but not the one I was hoping for!
First of all, my focus knob is a little out of the middle, it seems from their diagnose (they want to repair it, at least!). Focussing was still smooth, but a skewed knob will, after time, develop more play, and the cap on the focus know fell off all the time. I didn't realize this would be a problem, but Zeiss considers it a must-fix problem, and I guess they are right.
From now on, I will not put them loosely in my daypack anymore (I guess that's how the focusser got skewed, e.g. putting the bag down).
The focus repair is 130 EUR.
But above that, they charge 68EUR for cleaning and remounting the right objectif lens (+ nitrogen filling), while I feel that any cleaning on the inside should be warranty, and I must say I did not even see any dirt (would let them do anyway, as I do not want to have fungus or the like inside).
The rubber armour, which was actually my only concern, would be 30EUR for two objectif lens rubbers and the glueing. They didn't mention anything in the to-be-repaired sheet about the rubber on the polycarbonate part of the bin (where you put your thumbs when holding the bin, that part is also loose), and I feel that repairing rubber armour should be warranty, as it is clear that the glue they used, at least for some some batches, was clearly sub-par quality for a high-end binocular.
So today, I replied them that I can agree with repairing the focus knob as it is probably my fault, but I did argue about not wanting to pay for inside dirt and rubber housing issues. To be continued...
edit: I forgot to mention that 20EUR was within warranty (small parts), and 60EUR was coulance