Just one thing i feel like adding to this, is if youre like me, and have had to work on an R32 that is (illegally) low, so low you cant even get your arm under it.... then there is another way to get the oil in, other than the filler bung.
We ended up jacking one side of the car up a little, so you could JUST get your fingers on the filler bung (to put it back in), and since the box had just been out, the shifter wasnt installed. We then proceeded to fill the box, using a funnel made of an old 2.25 sprite bottle, through the shifter hole, untill it started to dribble out of the filler hole. When that happened, we all poo'd our pants and my mate jammed his arm up under the car to put the bung back in place.
Of course, car was too low to tighten it up like that, so we had to jack the whole car up enough to get under and tighten bung back up. Put shifter back on, and tell kid to come pick his stupid car up and get it out of our sights.
That, is my life story.