I was in for service on my 2015 V60 yesterday - really the problem I had was a TPMS issue, and they replaced one of the sensors.

But they also did a CEM upgrade (31270560-1). And now I note that start/stop now seems to be disabled. I go into "My Car" and it just says that the electrical system won't allow it, but it is very vague as to the reasons why.

So my question is, did this CEM upgrade happen to disable start/stop for some reason? Or is the problem that it wiped the settings, and they need to go in with VIDA and re-enable it?

I am puzzled - this isn't a huge deal, but fuel economy in the city sucks when start/stop is turned off (such as in very hot weather).

 

And tonight it started working again. No idea why - I didn't change anything.