Join Date: Jan 2008
Location: Boston, Lincs
Odds on it will be down to the position of the Bowden Cable in the Passenger Door. This is very critical and has to sit in just the right position and the sleeve of the outer cable has to sit in the Internal Handle just right. When I do mine I loop string around the cable which I hang out of the bottom of the Door Card so I can try a gentle pull if it isn't located just right.
The trick is to put the Card back on and just use one screw to hold it in position and then try EVERYTHING, including locking with the key. Only when satisfied put it all back together fully.
In the unlikely event that it isn't the Bowden Cable causing your problems a Search on here will give you lots of information, there has been much discussion on this topic over the years.
The " Roller " thing you mention is probably the Micro Switch for the Window, these were fitted only on cars with the autodrop system, my P1 doesn't have them.
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