Aneesh

todays little job
you may note, i have a plate light out

i had considered and was going to just replace the bulbs.......
right up until i went on ebay, and found replacement lights for £7 a pair
sod it, the old ones would only break when removed

genuine PSA too!!
did i mention i ordered them at 2pm yesterday, so less than 24 hours

quick test, yes a vast improvement!
didn't want to go LED as those look tacky

all fitted happily into place, very very happy

So is the bouncy ride at the rear? Could be bad spheres, just push and see if you are able to press the corners.
If its the rear arm bearings you should be able to hear noises when changing suspension height. If the ride setting is too high or too low can also cause poor ride. lower tyre pressures also improve ride, maybe your tyres are overpressurised.
 
The issue you mension about the hesitation could also be due to stuck EGR valve.  You could block the EGR return and see. Injector issues can be tested with a lexia, though if you have the 2.0 hdi, they are pretty reliable.