If you look at the plane towbar, the support wheels are off the ground. That suggests that the hitch is connected, and that the X5 isn't just parked in front of the towbar. So yes, it is for real, IMO.

Edit: Decided to find out what kind of plane it is. Seems to be a Dornier 328JET. Empty weight liusted at just under 20,000 lbs, maximum takeoff weight 30,000 lbs. The X5 will pull 9000 lbs on the highway at 120 km/hr, so 20,000 lbs at low speeds around the taxiways doesn't seem like a stretch.

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue