I've searched the forum and struck out. I know I've read about this but can't find it.

I acquired a 1971 280SE that was originally a Euro car. I have a problem with the windshield washer and windshield wipers.

1. Wipers don't park. They just stop wherever they are when I turn them off. Why?

2. This car has an electric washer pump. Is that normal? If I press on the frog it causes the water to pump electrically. I realize that the frog is supposed to activate intermittent wipers and that possibly someone has re-purposed that switch to power an electric pump, and in doing so caused the park feature of the wipers to not work

3. What do people use for replacement wiper refills without ending up with black wiper blades?

Thoughts?
thanks
Scott