Had a strange noise and vibration in the steering wheel only when applying and releasing the brakes at low (like walking) speeds. Luckily the dealer tech reproduce the problem and agreed it shouldn't be there. He finally discovered that one of the front sub frame bolts was not properly torqued down. 1/4 turn of his wrench and the problem was fixed.
I have no idea if this is common or not, but wanted to post it in case anyone else has the same issue.
John