drained the coolant in my a4 2.4 v6 and thought straight forward job bleeding the system but my heater is still blowing cold,is there a bleed screw on these cars thanks

 

A 2.4 liter V6 from Audi? Are you sure? As far as I know the smallest V6 Audi has ever produced is a 2.8 liter model. So, what engine do you really have in your car?

Edit: I stand corrected; I just found a reference to a 2.4 liter mill Audi used to produce in the 5-Valve per cylinder configuration. With that in mind, my guess is that you're not in North America; yes, no?

Under the assumption the 2.4 is a sibling of the 2.8, then ss for there being a bleed screw, no, not that I'm aware of. As for no heat, have you replaced the thermostat?