This place claims to sell a paper maual for about $67 and the Factory CD type manual for $47.
However, that last time I recommended one of the CD manuals but, for another chassie I was told they wer out of stock. So I would contact the seller first to besure what is in stock and what is not.
People sometimes complain about the Factory CD as it does not have good pics. But, what the Factory CD does have is a huge volume of information in it.
I have never read of anyone who has the other paper manual that they sell so cannot comment on that.
http://www.mercedesmanuals.com/Mercedes_Benz_Manuals_1980_1989_Factory_Official_s/3.htm
Bently is another company that makes and sells manuals. However, they are about $100 each and no one has written a review on their manuals either.