td5 is juicy to run, has fuel pressure regulator leaks, wiring loom in the heads break down, air suspension is shite and generally not that much cop to drive either

300tdi isnt that much slower tho, nicer drive and much better on fuel. but they do suffer with tin worm round the rear wheel arches (inner and the bit behind the door shuts), boot floor and the front inner wings, and brake pipes seem to rot out nicely from front to back.

but id go for a 300 over the td5 any day, and they have less leccy crap to go wrong too