I'm currently looking for a 405 TD estate, preferably a MK2, as I've been told these have a better interior. Anyway, so far I've been to look at a couple - one was a 93/4, and had a top mounted IC, done 115000 miles, and had a very droney sounding engine, as if something were vibrating. The other was a 96 or so, and had a less droning sound, but a very loud turbo whistle, and had done 170 thousand miles, and looked to be in a bit of a state. Can anyone tell me what a 405 TD in good nick *should* sound like? I've a fair idea about petrol engines, but I usually only ever encounter diseasels in tractors....