When I brought mine in for its yearly dealer visit I did comment on the steering clunk. The service advisor said he knows about the issue and his solution was to simply "work out" the steering column adjust. Basically, release the steering column adjust lever and work it through its range of motion many times. This will distribute the grease in the adjustment linkage and fix the issue. Indeed, when I got the car back the clunking was gone and the steering is smooth again.
Incidentally, they did mess up my brake fluid flush though. Somehow they got air into the system so I ended up with a rather spongy brake pedal. Had to bring it back and have the repeat the flush. Not great but glad they made it right quickly.