Another w126 plug/wire question
 

I'm looking at a new set of Bremi plug wires. I've looked at several sites & several brands, but none of them specify which type of plug they're designed to work with - threaded or SAE (button).

If I buy a new set of plugs designed for my engine, which plug end are they going to use?

Don't the tips unscrew from the plugs if needed?

Depends on the plug. The NGK site lists two different stock numbers for the same part number (BP5ES). One has a fixed terminal and the other has a removable one...