Interior problem
1996 Subaru Outback 4 cyl All Wheel Drive Manual

3 questions: 1) the rear windsheld wiper moter sounds like its working but the wiper isn't movin. I can't get the mechanism apart. The large nut on hold the assembly on from the outside will not come off. How to remove and can it be repaired?

.2) the red taligate lense is smahed. How can I remove it.

3) there is a leak in the power steering. Stop leak isn't really solving the problem. How to diagnose and repair.

4) defrost works but isn't great. Is thi typical o i there a fix?

thanks