So I've been trying to get some help on this for a while now but no one seems to know the answer... I was wondering if any one can tell me how to open up the calipers on the 2007 G35 Sport sedan.

I've done brake replacements before and have no problem doing it on this car, with the exception of removing/opening the caliper to get to the pads... I tried fiddling with them the other day for a good half hour but couldn't figure out for the life of me how they open up. There are no rods/pins/screws... - nothing. Looks like a plain surface without any apparent parts to deal with in order to open them.

If no one knows the answer, I was wondering if someone can direct me to the service manual where I can hopefully find the answer...

TIA