As my car is nearly 3 years old I thought I had better regrease the sliding pins in the rear calipers. This is not a difficult job ( though the pins are different designs top and bottom) but if not done, the grease drys out, and if you jet wash your wheels often, water can get inside the rubber seals and seize the pins. Anyone else done this job?
Turned out one of the pins was seized and took some serious hammer and punch action to get it free. Definitely a routine maintenance job worth doing every year or so, it doesn't appear that main dealers do it as part of the services because my Mk4 had SEAT FSH.