I think one of the most nifty little touches on the Golf is a low washer bottle warning - very handy if like me and you don't check!
I'll assume that feature only came with cars that have the winter pack added?
I'm guessing your's aint working either? My low washer liquid wanring has never come on (it just runs out). Pump is fine and jets seem okay front and back, so i know all is working. I've pulled the sensor out (spilling liquid everywhere - didn't think that one through!!) and pushed it back in firmly, but still nothing.
My last car had it, and it was really useful.
So if you work out how to fix it, let me know!