I found it very helpful having both the official MB and Haynes manuals. In some cases the MB manual superficially covers a subject, whereas the Haynes manual goes into more detail - and vice versa. Or, the MB manual says to use a certain MB special tool to R&R a component and the Haynes manual will show a non-special tool to use or a simple way to make a special tool. Or, the MB says to remove the engine but no info on how to do so - the Haynes manual goes into a step-by-step procedure.

Also, your library may have some manuals that should be kept in mind. My library has the Mitchell service manuals that contained info., specs, and operations not covered at all, or in less detail, or alternative operations than in the MB manuals. For example, my 300D auto. trans. was covered in great detail including full internal views with overhaul procedures and a great trouble shooting section - same for the AC/climate control (although the MB manaul is very good). Also, my library has instructural manuals teaching how do to do auto repair that can come in handy (the only specific info about my diesel injection pump was found in a diesel instructional manual, info furnished by Robert Bosch).

Hope this helps.

Tom

__________________
America: Land of the Free!

1977 300D: 300,000+ miles

American Honda: Factory Trained Technician & Honor Grad.
Formerly:
Shop Foreman;
Technical Advisor to Am. Honda;
Supervisor of Maintenance largest tree care co. in US for offices in Tex.