Marks88,
The haynes manual is good but skips too many important issues (my opinion) the CD is very indepth and through but is not published for the public, it has a big tech flare to it. Partshop will sell you the MB factory CD, however check ebay for pcgates version, much less expensive and just as good, they are the only ones to sell their own disc, sorry parts shop. I have used all three and they are all good (pcgate, most bang for buck)CD in SC.