Is your 5er's pin box adjustable? If so, you might be able to raise it. Be certain that what ever adjustments you do, provide you with sufficient coach to bed rail clearance. On our's the recommended is 6" - 7" and I have it configured for 6.5".
Tina + Dutch and Bell, Bobo, Harley, Buddy (the dogs)
2011 F350 Lariat 4x4 DRW SuperCrew 6.7L (B&W setup w/Air Lift 5000 Ultimate)
2014 Columbus 365RL (Airflex and Voyager package)
Nights Camped 2014 - 154
, 2015 - 32, 2016 - 4