Last week a squeak developed in the right rear cargo area. It only happens when the car is somewhat cold, never in hot conditions. I'm going to take it in on Friday, for two reasons. First, it is really annoying, but more importantly, there is a 330v battery back there, and I want to make sure it isn't something important. I read over in the C-Max forum about some folks who have had noises back there and it turned out to be a loose battery and that sort of thing. It sounds like something rubbing together.
BTW, I removed all items back there and it was still there. I also folded the right rear seat down, and it was still there. I eliminated the cargo cover as a source. It may be a coincidence, but I noticed the squeak after my first fill up, so it could be the filler door, but I also found that the dealer had underinflated the tires to 34 lb (one was 32!), and I upped the inflation to 42 in each tire, so there were two things that changed right before I heard the squeak.
I'll report back when I find out more.
EDIT 20 Oct 14: The car spent all day at the dealer. I had removed everything from the rear, and the squeak was still there. They had the interior folks look at it and decided it was not anything inside, and there was no electrical problem.
It is back in the shop today to see if it might be something in the right rear suspension that is being heard inside the vehicle.
Edited by stevedebi, 20 October 2014 - 09:50 AM.