Jerry Grubb

I’m so non digital it’s scary and now I must be getting too old but I want to upgrade the speakers in an 07 SL55 myself if possible. I did it in a 96 sl320 a few years back and it was easy. I would like to know what speakers fit and hopefully louder and what ones would give me some bass , are there any speakers in the rear, no fader in my controls.! Please email me at jffgrub@aol and thanks for helping!