Help with Manuals or documentation

[BnObob]

I've read through a bunch of posts, and have seen references to many manuals & docs. MB produced and 3rd party. And I have Googled these titles only to find covers and recommendations,. but nothing as to Table of Contents or what to expect in them. (Like flipping through one at the store BEFORE your buy ! And...

I am going to do some electric and vacuum work, which requires interior panel removal(s). So....

Of the several out there for a 1989-1992 300 sedan (Hemmings, original MB Cd set, one called the Owners bible or others?) which ones has anyone used that has:
1. Body panel removal photos
2. Vacuum diagrams
3. Electrical/wiring diagrams

I'd like a recommendation from someone who has actually use one of these, and knows the contents, before I plunk down $$ and end up with an unusable book.

Thanks in advance !!!!!!!