Have tried disconecting again, tried holding the Poss. and neg leads together, tried reconnecting battery with key in II position (as per Volvo XC.com site advice) nothing, nothing, nothing. Neither Volvo USA, nor any of the Volvo dealers in my area claim to be aware of this problem. Very frustratin...

I have exactly the same problem. Anyone got a fix????

But I'm not likely to blow the seals... right?

What happens if you over fill when you do the flush?
Tried this, had great and noticable effect and drove for 200miles after, but I believe I over filled by quite a bit...