check all of your fluids...make sure everything is good to go and has been replaced recently....oil, brake fluid, antifreeze, transmission fluid, spark plugs ...if u get it into your garage that would be the first thing i would do even with a service records....
i hope u like your beemer i had purchased 2001 3.0i with 95,000 with a full service record
never had any problems...i love it. Good luck