If you want to undertake fixes for your TGB Sunset 151 then it is always a great idea to have access to a Workshop Manual for reference if perhaps you want to know ways to take off a certain component for instance the Clutch and fit it again accordingly.
TGB Sunset 151 Workshop Manuals can offer you exact diagnostic guides for your car therefore if something is not working it can help you understand what the problem is and the way to repair it. After that you can determine if this can be achieved by yourself or in case the job is just too big you can still book your Sunset 151 into a decent car garage.
TGB Sunset 151 manual