Hello everyone - just picked up my 525d on Friday last.
It's done 110k, and the only thing I've found wrong with it so far is it takes too long to warm up (>10 miles) and runs cool unless idling or under load.
From reading on here, sounds like its not uncommon to for the main or EGR thermostat to fail, so I'll be looking to get them changed under warranty.
Here's a couple of pics of it.
So far, so good.
PS have been reading the forum for a year or so, since my previous car (a Range Rover Classic) has an M51 engine from a 325td - so thanks for all the great help so far.