If you wish to undertake fixes on your own Sachs Roadster V 16 then it is usually recommended to have access to a Workshop Manual to use as personal reference should you need to know easy methods to remove a certain component for example Clutch and match it again appropriately.
Sachs Roadster V 16 Workshop Manuals will give you specified diagnostic wisdom with regards to your car therefore if something is broken it will help you discover what the issue is and tips to fix it. You will be able to assess if this can be achieved yourself or in the event the job is simply too big you are able to book your Roadster V 16 in with a decent mechanic.
Sachs Roadster V 16 manual