Knocking from the rear is likely to be subframe bushes or anti-roll bar drop-links, too. And if it's a prefacelift (not that you should really be buying one when 53 plate onward ones are so cheap now) then check for rusty door bottoms.
Aside from the usual stuff you'd check on any 2nd hand car, I can think of:
I'd rate the build quality as a bit better than average. The things that are likely to break prematurely are relatively cheap to fix.
- Sagging rear bumper (some pics in this thread)
- Limited movement of passenger electric mirror
- Seat electrics - check movement in all 8 directions
- Seat heating - can be too hot or too cold but fairly normal for there not to be much difference between the 5 settings
The problem with the fuel economy is that while yes you can get 35mpg indicated while on cruise @ 70mph, if you measure the entire trip at the pump it's more like ~30mpg. Add to that if you get bored and decide to go a bit quicker you're talking ~28mpg for a motorway trip.
Relevant poll: http://www.stdrivers.co.uk/forum/topic/22750-st220-average-mpg-poll/
Think my impatient self of sealing and bolting the exhaust on and going straight out bombing it down bypass may not of been the best idea.
should have left the sealant to harden up properly. Went underneath today and the exhaust was leaking slightly from 3 parts
Now sorted.
Spotted where the exhaust was tapping to so that's sorted.
Also, the big wheel on the drive belt, that has some right play in it. This normal? Surely not.