recently had a problem with my golf where the comfort ecu messed up and i running low on fuel and couldnt open the fuel filler cap, found some posts saying there isnt a manual way..... there is
open the boot and pull back the material under the plastic shelf the parcel rests on, then stick your head at the most akward way possible and look up a few inches above the top of the filler cap and there is a thin metal rod leading to a solenoid which pulls the lever when the button works, with some long nose pliars you can lift it up and pop goes the cap, takes some fiddling not much force tho .
good luck
Tom
