I'm saying if both rear doors stopped working at the same time, it's unlikely an actuator problem..
like I said before super locking just disables the interior door handle.. and on these actuators, everything is in one sealed unit... including mechanical inputs for all door handles, locking tumbler, door key, and even the latch that holds the door closed..
so when you super lock it, it's just flipping some other lever inside... there may very well be two or more little motors in there... take one out... have a look...
if you have experience working on german clocks, you'll have a blast.. I've opened mine up... and quickly gave up and ordered a new part.
so, basically... you won't take off the door panel and find 3 or 4 separate parts you can replace.. it's all in one..
here's what one looks like.. on the back side is the latch, the only part you see from the outside of the door, that catches on the door frame pin.
http://www.roverparts.com/Parts/FQM100710G.cfm
have fun.
Pdogg