What size brakes are on the car, the stock 9.4" or maybe GLi/MK3 10.1"?
If you've got big fat bleeder chances are they're 10mm. I know that VW used different versions of the Girling54(10.1"/11.0") calipers, some with 7mm bleeders and some with 10mm. It's also possible you have aftermarket calipers with larger bleeders or even that someone drilled out the bleeders to a larger size at some point.



