Hi lads,am changing the rear pads on my 2006 Mondeo,but have run into a problem.Ive the tool that pushs and twists the piston into the caliper,but the piston does'nt want to move in.I've done this job before on a Golf,Primera and XR4X4 with no hardship.Am I missing some trick on the Mondeo caliper??Thanks in advance,Micky