I have them all, Hayes, MB-CD, Chilton, and MB Manual for my 300D, what I have found is that each one offers a little more information than the other. None offer 100% complete rebuild for all components for your vehicle, you have to be a old shade tree mechanic to know what they are talking about..

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2000 Ford 7.3 Powerstroke 4x4
2006 Mazda Tribute
1983 Black 300 D (donated to charity)
1993 Teal 300 D (160K) Sold
"I love the smell of burnt diesel fuel in the morning, it smells like ....VICTORY"

Semper Fidelis
USMC 1973-1976