If you have to carry out adjustments on your own Diamo Velux then it will always be recommended to have access to a Workshop Manual for a guide in case that you want to know proven methods to strip off a particular part like the Wheel Bearing and install it again appropriately.
Diamo Velux Workshop Manuals will give you identifiable diagnostic guidelines for the car therefore if something is faulty it will help you discover what the issue is and methods to repair it. After that you can determine if you can do this by yourself or in the event the job is just too big you could make a booking for your Velux right into a nearby car garage.
Diamo Velux manual