Yes, the rear seatbench needs to come out. It's easy to remove though. Just push in the two orange tabs in front of the seat.
You could also remove the seatback for easier access but I did not find it useful to remove them.
Then there are two screws just below the rear seatbacks (one for each panel) that holds the panels to the frame. Look for them, they are at the bottom of the panels near the wheel wells.
Then you have to take the power window switch out
remove the chrome covers on the door jam area
I just removed my plastic C-Pillar panels by force and nothing broke so far. I learnt to put them back slowly and carefully though.
work on the right one first - lubricate the track using some sort of grease and lubricate the regulator's jaws too.
See if that helps that side work correctly. With the panel off, slowly raise and lower the windows... get familiar with how the whole thing works and how it's supposed to know when it needs to stop, etc.
Then work on the defective one!
Mine also went down halfway. I fixed it by installing the arm that connects the window regulator and the window itself correctly. (There are two ways of installing it... only one is right
)
but seriously... once they work... the coupe looks REALLY nice! So many CD posts lately... really make me want to buy another one
