Regarding the service manual:
Even if you don't do stuff yourself, the biggest reason (in my mind) for having the service manual is to keep the dealer honest.
This way, if work is being done you know how they should do it right. I found two different dealers didn't follow the manual- one didn't replace washers that the manual states must be replaced when the bolt is removed, andother didn't check the alignment after a suspension part was replaced.
You'd be none the wiser, assuming the dealer is the expert, if you didn't have the manual.
I ordered mine before they were even shipping them.
Around $65 and worth it.
Ard