Its time and I want to do it myself but what does it in tale and will I have to replace my coils if I don't have a driveability issue? Please advise. If you have a video link please share. Remember supercharged not normally aspirated.

 

Remove wipers then cowl cover.to gain access the rear spark plugs. Pop off coil covers. Use 8mm sicker to remove coils.you should now have access to spark plugs.

 

Correction I don't think you need to remove the plastic firewall. I was thinking of when I removed the supercharger.

 

If it is similar to my 2005 XJR it is not difficult to do. The worst plug is on the drivers side rear most position.
However there is a flap in the side of the "box" surrounding the brake fluid reservoir that comes out allowing much better access with the correct socket and adapter.

Also go with the factory recommended plugs. I did not 1st time and got noticeably worse mpg.

You do not have to replace the COPs unless of course any are bad.

Also IF you ever have to remove the super charger it is NOT necessary to remove wipers and the plastic cowling. Just lever up the passenger side.

Trust me I have done that several times.