RE: Marathon - adjust recline angle?
There are two reclines on the MA -- reclined and upright. We used reclined the whole time DS was rear-facing -- it was the only way he had enough leg room. When we went forward facing, we put the MA in the upright position (I think you have to in order to get a good fit). The manual (as bad as it is) should tell you how to adjust the recline. It doesn't go completly (90 degrees) upright, but it lets the child get a good view, while still being able to fall asleep comfortably.
Mom to Alex (2002) and Catherine (2003)
"The challenge of parenting isn't shaping your kids to be what you want, it's shaping yourself to be what your kids need." - Wellyes