....you surely mean "Döner"
I would if the right keyboard was installed and if I was writing in a language other than English where that character isn't used.
Doner kebabs are a delicious invention. Apart from the (famous to the point of being legendary but closed for 20 years now) Theo's in Leeds he best one I ever had was actually in Kuwait with Istanbul a close runner up.
One think I don't see in Berlin is the kind with Indian spices which are getting popular in the UK; they're very edible and I think you'd like them. The Berlin ones are sort of classic doners.
One think I've noticed in Berlin and the UK is that the quality isn't what it used to be; perhaps due to the giant slabs of meat (varying a lot in price and quality) at wholesalers. Plus of course they really do need to be lamb to get the taste right and of course other meats are cheaper.
In Poland, kebabs are improving slightly from being fairly awful a few years ago, however they're still terrified of using spices, chilli, etc and the 'salad' always has watery decomposing cabbage in it. Immigration has improved things; the Amrit chain in Warsaw is good.
In Berlin, I get Turkish food because it's a. tasty and b. I'm never sure what else to get. The sausage, just no Chinese food is what it is anywhere and I'm usually there alone when travelling through so don't want to sit in a smarter restaurant alone. Any recommendations are welcome. Something German (just not currywurst) would be nice.
A Polish deli? Maybe, but probably no since it's what's available right here and Polish food is bland enough anyway. And if you want a deli, sandwich shops/bakeries there tend to be good anyway.
British ones are very poor in my opinion.
You're going to the wrong places. If you're ever in my town, I'll take you for an excellent one. Though you'd probably prefer an Indian meal there since there are several Pakistani and Bangladeshi owned restaurants better than any on mainland Europe.