Hubby has a 2012 Mercedes GLK AWD and actually hates the way it drives because of that. He has a bad back and we bought it because he could barely get in and out of my Jaguar anymore. I still drive the Jag because I love the way it drives. lol
He needs to check the manual - mine allows me to turn it off by holding a button for 3 seconds. It leave a light on the instrument panel to let me know it's off, but it's no big deal. Turning it off gives me peppier acceleration and crisper shifting of the tranny - especially downshifting when you step on it.
I'm envious - I bet the Jag is a fine ride...