If you choose to conduct fixes on your own TGB 303 50 then it will always be recommended to have a Workshop Manual to use as personal reference in case that you need to know simple methods to remove a specific part much like the Clutch and fit it again adequately.
TGB 303 50 Workshop Manuals can offer you targeted diagnostic facts with regards to your automobile so if something is faulty it will help you ascertain what the issue is and how to correct it. After that you can evaluate if you can do this by yourself or in the event the job is just too big you can actually make a reservation for your 303 50 into a decent repair garage.
TGB 303 50 manual