The 200TDI PS pumps are poor quality and suffer from premature failure.
I installed a Mercedes PS pump from an OM617 and it works flawless and even has a replacable filter.
Been in use since 2012 and still works fine during a daily drive scenario minimum 1 hour M-F.
Uncle "Richard" Douglas has a Land Rover with big wheels that never gets stuck... until he breaks something so it won't go. Uncle Douglas always breaks something. - Anna Crowther at the Conclave 2012 (AKA Carburetor Neck)
"What's with this death wobble, Uncle Douglas, I can't keep it in 1 lane?"
UD: "Just Power through it man!"