On the v70 (and I assume the s80 is the same) they have the bosch msa system but there was a changeover at year 2000. If the early version 15.7 then I am told that both vag-com and vol-fcr will work but the later 15.8 you need either the dealer vadis or possibly the bosch kit (ie not home mechanic stuff)
I suspect you are out of luck. our v70 is a 2000 model (ie late 1999 car but with the model changes for the 2000 year) and it is msa15.8 :(
The 15.8 was only used for a short while before the D5 came in. I havent looked into it in detail but I think the 15.8 is canbus which rules out a lot of cheap tools anyway. I tried a canbus reader and it said the bus was there but wouldnt talk to the ecu.
Thanks for the information, it's my check engine light thats on. Reading the forums implies the MAF so I bought one of ebay for £70, changed it but could not reset the check light. It ran for 50 miles before the same symptoms appeared, engine check light comes on when standing then when pulling away it's as if there is no power but eventually it comes. Turning the engine off then restarting clears it for awhile, but I need to cure it.
I can tell you that a Scangauge II doesn't work also the ilexa VOL-FCR, nothing that Gedan makes plus the PPC Diagnostic.
It looks like its the dealer! as I am in Nottingham I will give Dave Peacock at Chillwell a call?
Better still I took it to Dave Pengelly in Nottingham, he's just around the corner from me, he stuck it on the computer and it came back with ECM0033.
Which is the throttle posstion, so I am keeping an eye on it to see if it returns (which it will) then its back to him for repair