R26 Passenger window

Pull the passenger side speaker cover off, take speaker out and feel around for the wiring for the window motor, give it all a wiggle.

These window mechanisms are notorious for getting water in the connections and packing up. Ideally if this is the issue it needs to be taken apart and having the contacts cleaned and properly waterproofed.

 

Was it raining heavy? It'll be the window regs. Well documented problem. Do a search there is a diy guide to fixing them.

 

^^^ +1 on use the search, been covered a trillion times on Rsmegane & MeganeSport.
Easy job to do, just take your time as if you snap any clip, your going to be stuck will horrid rattles.