So I've been absent for awhile (owing to relocating from Japan to the USA, and bringing the Beat too!), and now come here after reaching my wits end in regards to my fuel gauge which has recently begun to malfunction.

After replacing the cam timing belt I noticed that my fuel gauge was not functioning properly. Essentially it's simply stuck at 3/4 and won't budge. First I tried to find any wiring or connectors that may have been disturbed during the timing belt job, but to no avail. Next I tested the fuel pump/sender unit with what still appeared to be no luck. Finally I disassembled the clock cluster to clean all the screws and oil any rusty bits. While doing this I set the fuel gauge to full for diagnostic purposes. After this it seemed as if the gauge was functioning properly, but it now seems (with ~100km from full) to be stuck in the same location again. Should I try pulling the fuel unit and testing it? I don't fancy running out of gas on the side of the road.

Thanks!