Need some help guys, 07 XS. Driving normally everything ok except on occasion I get a brake type squeek at slow speed from the rear after letting off the handbrake, this dissapears when I pick up speed. Normaly I would suspect it to be the shoes but it is random.
When I have 3 rear passengers in the rear or the caravan on the back the squeak is full time irregardless of the handbrake upto about 30mph and louder. Not had the hubs off yet but looking for ideas please. Audi A4 Avant 2.0 tdi 05 Liquid Blue
LFR 2.2 XS 07 Stornoway Grey
And a dedicated caravan puller CG

When its squeaking can you make it stop squeaking with a light touch of the bake pedal? Mine was doing that on the passenger rear, tried 3 times cleaning it up and chamfering the pads but the only thing that cured it for me was new pads. 
Hung like Einstein, smart as a horse.

Not sure I will have to give that a try. Thanks for the tip. Audi A4 Avant 2.0 tdi 05 Liquid Blue
LFR 2.2 XS 07 Stornoway Grey
And a dedicated caravan puller CG