[Peter86]

Before throwing money at parts I would take it a an independent volvo specialist or volvo themselves to fault find. I've previously had problems with juddering and it has been either a faulty injector but at that mileage that would be bad luck or I have had this with a faulty dual mass fly wheel but it did last a few years before going. Is your car manual? If the cars under warranty make sure you find the fault and get it fixed so it doesn't cost you.
Double check your engine mounts haven't perished.
Some specialist diesel fuel places that do injectors etc. Can test a lot of the fuel components on cars so worth looking for someone nearby if a fuel problem is suspected. Make sure the seller pays if it's under warranty.