My new Golf GLS-TDI has 4 doors, and so the front seats do not fold forwards. I had a 2-door 1982 diesel Rabbit, however, and its front seats did fold forward, but not entirely all the way down flat. It was, however, flat enough for me to slide in a coffin. That should be enough length to sleep on.
If you are still uncertain, why not just find a dealer with a 2-door Golf handy, and try it out first-hand?