I assume this is the model just before the electric parking brake was fitted, brilliant car, my son had the S60 saloon version with the 188bhp (i think) engine, it pulled like a train, had it been the estate version he would have kept it much longer.

If you haven't already done so, do remove the rear disc/drums and check the parking brake shoes, these can delaminate and can actually lock the wheel solid, make sure you have a couple of days grace though because the shoe hold down springs get weak so new springs might be required as well new shoes if they are needed, not something the average factor would hold in stock.

Ah, EPB would be completely different, ignore my previous post.