THERE IS A WATER EXPASION TANK ON THR RIGHT HAND SIDE OF CAR DRIVERS SIDE LIFT BONNET INSCREW BOTTLE LOCATED ON INNER WING AND TOP UP
MR FOSBERRY, February 2007
Depending on the model year it will vary in location
However look for the see thru expansion bottle with min /max lines It will ne the largest , do not confuse it with brakes or PAS the coilour of the fluid will be orange,blue or possibly purple