13B07 Rocks! :yahoo: Got the headliner and Powertrain Control Module update done yesterday, and what a difference in just what I've seen so far. The ICE does seem to run at higher RPM's at times, but since I almost never had the tach visible I can't give actual stats. Battery has higher charge more often. EV mode at 65+ mph. I filled up the tank before driving around town yesterday evening, and I was seeing MPGs of high 40s and low 50s for almost the first time ever. After about an hour of mainly city driving the dashboard MPG is at 48, and when I got to work this morning, it was at 48.2. Nice improvement, as I'd been seeing around 43 before the update. Go now and get the 13B07 update done on your C-Max! Also regarding the headliner, I can't see any evidence of the additional padding, or tampering with the headliner, so don't worry about it.