Ok mine had problems with the relay for the fuel pump . I see your one is the small relay nr4 . After i done the paperclip thing i went to skoda dealership and I paid £2 for one of those original one from them. Is worth getting a couple of them just in case.
but again please check and double
check to make sure that is the one . And DISCONNECT THE BATTERY before you mess around with them.
nr 87 was one under the hood next to the battery on that fuse board . I had an issue with the relay there ticking very fast because it was bad that is why i mentioned it as well, so no need to touch that if yours is fine.
i sold the car a month ago not because of these issue but because i upgraded to a 4x4.
i do hope you get it sorted.