Hi all, I have a 2007 S80 D5 185bhp with 88,000 miles on the clock, it just started losing power about a week ago, intermittently. I have changed the fuel filter with no difference. Turbo pipes seem okay, but found a plastic linkage disconnected front left side of engine , come from a stepper motor of some sort and goes to a link on the cylinder head. Reconnected it but doesn't seem to have made any immediate difference . Any thoughts or suggestions??