Hi,

Some time ago we spoke to eachother :-)

Don't flush the cooling system, all the little holes in the radiator and
hoses
that are now closed by the calgon and other dirt will start leaking.

- Turn the heater knob to hot air
- Drain the coolant and fill the system with distilled or demi-water and let
the
 engine run for a few minutes.
- Drain the water when the engine is cooled down
 (some 30 minutes with the bonnet open.)
- Fill the radiator with coolant and start the engine
- The coolant level in the expansion tank will drop, fill it up with more
coolant
- Don't close the expansion tank yet.
- Bleed the cooling system to remove the air.
  There is bleeding (air) valve on the hoses of the heater radiator where
it enter
  the dashbord under the bonnet.
  There is a (air) valve on the thermostathouse/cylinderhead, very
important to
  bleed this one. The cylinderhead is the highest point in the car and if
there is any
  air in the cylinderhead it may lead to overheat the head and blow out the
headgasket.
  The last one is on the radiator itself.
 (Check the haynes manual for the bleeding holes)
- Let the engine run until the radiator cooling fan cuts in.
- Check the coolant level and fill it up till maximum if it is dropped.
- Put the cap on the expansion tank and make a short drive (15 to 30 min.)
- If the engine is cooled down chech the level again, usually it will drop a
little bit, just
 top it up again.
- Check the level again next day.

Good luck!