The sales codes are in the invoice paperwork/window sticker
[EBA] = 1.8L 4 Cylinder DOHC 16 Valve VVT Engine
[ECD] = 2.0L 4 Cylinder DOHC Diesel 16 Valve Engine
[ECE] = 2.0L 4 Cyl DOHC DPF Diesel Engine
[ECN] = 2.0L 4 Cylinder DOHC 16 Valve VVT Engine
[EC0] = All 2.0L 4 Cylinder Gas Engines
[ED3] = 2.4L 4 Cylinder DOHC 16 Valve Duel VVT Engine
[ED4] = 2.4L 4 Cylinder DOHC 16 Valve Turbo Engine
[ED0] = All 2.4L 4 Cylinder Gas Engines
Read somewhere the serial number was at the back on top of the gearbox. Not sure if that is for the Caliber.