Iain, youre so right. I wrongly assumed the post is about the HDI 3.0 V6.
Thank you for pointing that out.
That way or another, seems that 3.0 HDI [HDI240] has only one bleeder point located on the heater pipes.
If somebody with 3.0 diesel could confirm that I would very greatful
The original post is about the HDi V6 (I started it! ). I think I perhaps wasn't clear about it though and that's why Kees responded with some info about the petrol.