The Devolo online technical help is triggered by certain key words for each specific model, so it is entirely possible you're searching for a term which is not linked to the 200 AV Wireless.
If you select dLAN 200 AV Wireless N and press 'Find Help' without typing in any search terms, you get a list of just a handful of questions to do with that product, which also seem to apply to most of the Devolo range. It is actually a very generic set of FAQs.
What're you trying to find out on there?