If you wish to accomplish fixes on your own Orion AGB 28 then it will always be recommended to have access to a Workshop Manual to use as a reference just in case you need to know the best way to strip off a certain component like the Door and match it again successfully.
Orion AGB 28 Workshop Manuals are able to offer precise diagnostic wisdom for your vehicle therefore if something is broken it will help you determine what the situation is and some ways to resolve it. After that you can determine if this can be done by yourself or if the job is too big it is possible to book your AGB 28 into a decent garage.
Orion AGB 28 manual