I have a 2005 C-280 4Matic wagon that I purchased used a year ago. In the last few days I’ve noticed a vibration and low frequency growl when I turn into a parking spot, pull out of said spot while turning the wheel, doing a K turn etc. It’s the kind of sound you hear on 4 wheel drive cars when the wheel is at it’s maximum revolution during a turn.
I can’t tell if this has always been happening and I am just noticing it now, or if something happened! Any thoughts?