If you want to accomplish fixes on your own BMW R 757 then it is usually a good plan to possess a Workshop Manual for personal reference should you want to know how to strip off a certain component for example, the Door and install it again perfectly.
BMW R 757 Workshop Manuals gives you unique diagnostic wisdom for the car therefore if something is playing up it can help you ascertain what the situation is and some ways to repair it. You can then decide if this can be achieved on your own or that the job is simply too big you can still book your R 757 into a suitable garage.
BMW R 757 manual