Hiya Dan007 - nice CD5 u got there. was it a dealership buy? manual/auto?

Like Sensei has said, make sure the timing belt has been changed (meant to be every 100,000kms).

1. With changing the oil every 5,000kms, I also like to change the oil filter at the same time (its only around $8-$10 anyway).
2. Also u might want to consider replacing the fuel filter (which I believe should be done every 50,000kms - check the manual).
3. I had a radiator flush when I bought my CD5...it wouldnt hurt neither.
4. Dunno if u wanna bother about replacing the brake and power steering fluids. Personal choice I guess.

I notice the previous owner painted the calipers blue? What other mods u planning?