been planning to bleed the whole system for a while now but there are a couple of things not mentioned in the Haynes guide: -does the A4 have a rear brake balance valve [like on Golfs] that needs clamping open? -does the ABS pump need to be set to cycle like on some of the newer Audis? also, just to confirm I guess, what wheel would be best to start on - Driver side rear? Thanks!!