Park 2 is mainly used for business jets on two-day parking, as well as by Lufthansa Technik for aircraft which are awaiting maintenance or awaiting ferrying back to customers.
The only location to shoot planes in this area is from the Treshold of Runway 14, in the afternoon and evening. Nightshots are possible with a good tripod but the angle will always be a bit awkward as you're shooting at the aircraft's 10 o'clock.
However, given the often awkward times at which aircraft arrive and depart from Lufthansa Techik, this is the best shot you might get of these aircraft.
A lens range of 200mm-400mm is necessary, and heat haze will be a problem in Summer.