If you choose to carry out maintenance to your TGB 203 50 then it is usually a good plan to have access to a Workshop Manual to use as a guide in case that you need to know methods to strip off a particular component such as the Exhaust and fit it again the right way.
TGB 203 50 Workshop Manuals gives you identifiable diagnostic information on your automobile so if something is not working it can help you identify what the situation is and tips on how to fix it. Then you are able to determine if this can be done on your own or that the job is too big it is possible to make a booking for your 203 50 in with a nearby garage.
TGB 203 50 manual