Hope you have better luck than my dealer's mechanics in trying to remove the rear calipers. I live in the salt-belt, and something seized that kept them from removing the calipers for some rear-brake cleaning that comes with the 60000km (3 years/roughly 36000 miles) maintenance. Bent tools in trying, thought it would be better left as is.
Will have to attempt again, and succeed, when time comes to change pads...