Thank you, but as I said there is no screw in my cover... All videos have a screw and it's easy, but I don't have any screw...
From the diagram below, there’s a bolt (number 4 on the diagram) but it’s not clear if the bolt is just for the fuel flap actuator or whether it also secures the fuel flap assembly in place. The orientation of the bolt on the diagram suggests it’s inserted from the reverse side, so it might be worth removing the right hand side trim panel in the luggage compartment to see if you can then access that bolt? If not, then access is probably from under the wheel arch after removing the wheel arch liner (
edit; see edit note at the bottom of my post before considering dismantling the luggage compartment trim or removing the wheel arch liner!)
I don’t know for sure as I don’t have an
Ibiza, but if it is necessary to gain access from either the boot or under the wheel arch, then IMHO that’s a terrible design if you need to replace the actuator (a part that’s known to fail) when access from the front by just opening the the fuel filler flap would be so much easier.
Link to diagram with part numbers;
Flap for fuel filler with collecting tray for
Ibiza/ST (SEAT) (IB) 2018 EUROPA
seat.7zap.com
Screenshot from above link;
Edit; the YouTube video clip below is of an earlier generation
Ibiza. On that generation car, it seems there is no screw holding the filler flap compartment in place behind the filler flap - the guy in the video clip is just using a plastic trim removal tool so as not to damage the paintwork, and some ‘gentle persuasion’ to remove it.
www.youtube.com
So assuming the filler flap compartment is fitted to your car in the same way, it should just pull out. If so, then the purpose of the bolt at no. 4 in the parts diagram above is to attach the actuator to the part you’re trying to remove.