good luck on the car hunt dunderhi. i'd stay away from MB due to their quality problems. one F10 squeak is minor in comparison to MB. My most recent W212 MB 350 4matics w/sport (had a 2010 and a 2011 rattled like crazy). dealer did not step up.
i had a 2011 ML350 that was was a miserable piece. after my time with several MB cars, I'm convinced that BMW is pushing ou a better vehicle. take care!
Auf Wiedersehen 12 550xi