If you choose to accomplish maintenance on your CCM 604 Roadster then it is always a good idea to own a Workshop Manual for personal reference in case you need to know methods to strip off a certain component including Drive Shaft and fit it again the right way.
CCM 604 Roadster Workshop Manuals gives you distinct diagnostic guidelines for the vehicle so if something is faulty it helps you find out what the issue is and the best way to resolve it. Then you are able to decide if you can do this on your own or if the job is too big you can still make a booking for your 604 Roadster in to a trusted repair garage.
CCM 604 Roadster manual