Can anyone help me with these questions?

• What is the order of cylinders in my 1986-420SEL? Is #1 the one on the passenger side at the front of the car, does it go until #4 at that side and then start with #5 on the front of the driver’s side?
• The manual says that it takes Bosch W8DC plugs; now it has Bosch W9DC; are they ok?
• Which ones are the hotter ones?
• What are the gaps for either kind? The dealer told me different gaps than I found on the web, 0.035 vs. 0.032 while now they are gapped 0.050.
• How do I take the distributor cap off? The wires will not come off.

Thanks for any help.