Hanging rear caliper

[Mike Del Tergo]

I guess I wasn't as clear as I could have been.
The 18 month R&R of the rear brakes included new/rebuilt calipers, rotors, 
pads, guide pin boots, grease, and fluid.  (I know it's not EBrake related 
because they are newer than 18 months, and I checked that first thing, free 
and clear L&R) I've been lucky never to have had frozen caliper guide pins 
on any of my dozen Audis.  I suspect because this is a must check on any 
Audi I've purchased.
So this week I'll try to discern nature of the bias valve Chris mentioned 
and report.  I'll also check the nature of all boots related to the RR brake 
sys.
thx
Mike