The only manual source, that I know of is the official Volkswagen source...Erwin! You can subscribe for one day and download, the manuals in .pdf format (digital file format). I am not aware; of any paper manuals as this time, Bentley Publishers lost their contract with Volkswagen, so new manuals are not being produced. Haynes and Chilton; may come out with manuals in the future. So far; these new generation Beetles are just three years old. It maybe a number of years; until they produce a manual. I would assume; for the basic mechanicals; the Jetta and Golf would be similar; as they share the similarity engine, trans etc.
erWin the only solution: (as of July 2015):
Your erWin subscription gives you unlimited access to the latest VW service information at a fixed price.
Note: To purchase a subscription, you must be registered and logged in.
Choose the subcription term you want:
One day -- $35.00
One month -- $225.00
One year -- $1,100.00
The advantages of an erWin subscription are:
Unlimited access to erWin service information for the subscription period
Quick access to the information you want
Access to vehicle-specific information
The latest service information
The files open fine; after they are downloaded. The subscription service and much of the Erwin services (similar to something like All Data), area geared towards pro independent repair shops, you can even get a genuine vw scan tool system through them.