Congrats. Since you have a 2011 M sport like me I would also keep an eye out for the Active Roll Stabilization system that is part of the DHP. BMW bundled this option along with the M sport package for the first year 535i/550 making the package roughly $6500. BMW later took the packages apart from 12-16. These systems are known to leak hydraulic fluid so I would keep an eye out for any signs of fluid spills on the garage floor.
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