The Citation XLS+, or simply "Plus" configuration was another upgraded version of the aircraft which began delivery in 2008, with the inclusion of FADEC engine controls, improved PW545C engines, and a completely revised nose design similar to that found on the Citation Sovereign and Citation X. The Citation XLS+ features Collins Pro Line 21 Avionics and a four screen LCD EFIS display as opposed to the three tube (CRT) Honeywell display in the XL and the three screen LCD Primus 1000 in the XLS.