Interesting. I just bought a 2012 X1 for the wife - no start/stop/Eco-mode. I believe my engine designation is N20, not 26. We had the X1 in Canada as a 2012 model year.
I'm wondering if the attachment you didn't have beneath the engine cover is on mine then? The Hartge unit has 5 connections for the N20 and doesn't mention any of them not in use.
Regardless, great review and thx for the pic.
Btw... Is there a petition anywhere we can jump on to get BMW NA to address the obvious throttle-lag issue?