I would like to comment on the second problem item with the rattle, you are suffering with identical rattle to our newly purchased td5 ser 2 2001, we have just recently taken our l/r in for diags on the rattle.
The garage have told us that, where the down pipe(manifold) meets the the first box section there is a coublin device that allows for movement in the exhast, this is beginning to break down and two metal components are rubbing together.
The cheapest price for the front box section is £87.00 + vat online from britpart +gaskets are for joints are 0.20p each approx
We are off to watch the world offsore power raceing in isle of weight this weekend, so i hope it should not give us grief as this is the first time since having the car that a large distance will be done.
best of luck
mcw bridgwater