If you need to carry out repairs to your Sachs XTC N 125 then it is usually recommended to have access to a Workshop Manual to keep just for a guide just in case you want to know easy methods to take off a specific component much like the Dashboard and install it again effectively.
Sachs XTC N 125 Workshop Manuals are able to offer certain diagnostic guidelines for your car so if something is playing up it will help you identify what the situation is and some ways to correct it. You will be able to evaluate if this can be done by yourself or if the job is too big you could make a booking for your XTC N 125 in to a decent friendly mechanic.
Sachs XTC N 125 manual