Ive always bleed the system by leaving the car idle for 20-30 mins with the cap off the header tank.

Sometimes had to drive round the block and then release the pressure.
 
Hi,

Never done it on my seat (yet), but on my old car i basically set it to about 3,500rpm, most of the air can be seen bubbling up to the header tank. Give the water pipes a squeeze as well to force any trapped air, watch out tho they get very hot. I do believe that there a bleed valves as well along the way.

James
 
it may not have bleed valves.
it may be self bleeding. ie just poor into the expansion tank.
something to do with how its designed. thought i dont actually know on the ibiza.
i do know the corrado was self bleeding. (after i spent time looking for the bleed valve myself)

what makes you think it may have air in the system? is it over heating?
it could be the water pump.
 
YOur probs looking at water pump failure as the lack of hot air could be the water not circulating around the system advised not driving it n gettin the water pump checked? Do the cooling pipes get hot from both sides of the radiator?