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EricRyan -
On my 1999 SW2, which is based on a 1996 design, I have DFCO (Deceleration Fuel Cut-Off) in 3rd gear *above* 2500 RPM. I have a digital AFR (Air Fuel Ratio) gauge so it's easy for me to see DFCO. On a 2012 car I believe the DFCO is much more aggressive, aka near the idle RPM.
However, I have heard that you can *detect* DFCO without gauges because the engine sound changes and/or you feel a "bump" when the DFCO stops. If I were you I would find some steep hills and pop it in third such that the RPM was at least 3000 in third. If the engine braking doesn't lower the RPM below 2000 RPM then I would *gently* depress the brake to see if I can detect the change in engine sound.
CarloSW2
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