Interesting thread - when I got my late 2008 (manual) XC70 in 2012, something called "Kess Tuning V2 or K-Tag" was provided to "remap vehicle for power and economy".
I'm not familiar with the various options and I have wondered, from time to time, whether the remapping would have been (a) visible to a Volvo dealer when servicing or (b) affected by software updates. It's always been to a main dealer for servicing until a year or so ago, when I found a good independent guy.
I get an average of ~30mpg and the performance is fine (better than it was when I test drove it before I bought it, when it was noticeably sluggish.
Can anyone shed any light on this?
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