BMW 540 Workshop Manuals
If you need to undertake fixes to your BMW 540 then it is always recommended to own a Workshop Manual to keep just for reference should you need to know easy methods to take out a specific component such as the Brake Discs and fit it again the right way.
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BMW 540 Workshop Manuals provides detailed diagnostic info for the vehicle so if something is wrong it can help you find out what the problem is and ways to resolve it. You can then assess if this can be done on your own or in the event the job is simply too big you could book your 540 in with a trusted friendly mechanic.