If you want to undertake maintenance tasks on your own Dafier DFE 250 then it will always be a good idea to own a Workshop Manual for personal reference in the event that you need to know methods to remove a particular part much like the Wheel Bearing and fit it again effectively.
Dafier DFE 250 Workshop Manuals are able to offer identifiable diagnostic info for the vehicle therefore if something is faulty it will help you work out what the problem is and tips on how to resolve it. After that you can analyse if this can be done on your own or that the job is just too big you can book your DFE 250 right into a decent car garage.
Dafier DFE 250 manual