You can find the manual in PDF format here: https://www.gardena.com/ch-fr/outils-jardin/entretien-pelouses/tondeuses-robots/tondeuse-robot-sileno-city-250/967646804/
Under information and service, at the bottom of the page, there is a "user manual" where you can download the manuals for the different models.
No, only the Gardena smart Sileno can be controlled by an app, but can be retrofitted :
https://robomaeher.de/blog/wlan-modul-automowergardena/
but I would buy the smart right away.
Greetings sigi
Unfortunately not. For the smart gateway system you need to buy a smart series mower like this one: Gardena smart automatic mower Sileno city 500 (500m²)
Have recently bought a 250 and a 500 EU model. They work fine in Switzerland and I don't see any disadvantages. Even the CH adapter was included. But I don't know the CH version.
Unfortunately, I couldn't find this information anywhere at the manufacturer's or on the web in general. With a bit of luck, someone else will answer your question.
In this case, you must set up a side area. However, the mower must be carried there. As far as I know, a second station is not possible because you cannot have 2 different guide cables.
Here you can find out everything about secondary areas:
https://www.youtube.com/watch?v=w4aCUhLxzEM