2012 CAT AP1055E , Comments: I have not seen the grade control. It is a TOPCON system, Crown Control - Power, ECM DOWNLOAD: NO, ENGINE TIER RATING: TIER 4 - INTERIM, EXTEND-A-MAT-SCREED, FEEDER CONTROL, High Ambient Cooling, Lights, NIGHT PAVING GEN SYS, Online Owner's Manual , PRODUCT LINK: INQUIRE FOR OPTIONS ON, PUSH ROLLERS, Rubber Track Width: NA, SCREED, Screed Extensions - Height Control - Power, Screed Extensions - Slope Control - Power, Screed, Slope Control, SONIC, Tire Size: NA,