If you have to execute auto repairs to your BMW R 1200 R then it is always recommended to have a Workshop Manual to use as reference in case that you need to know the way to take off a certain part like the Door and install it again effectively.
BMW R 1200 R Workshop Manuals will provide you with special diagnostic guides for your vehicle therefore if something is not working it will help you figure out what the issue is and the way to resolve it. You can then analyse if you can do this by yourself or if the job is just too big you can book your R 1200 R into a local mechanic.
BMW R 1200 R manual