New owner of C300 Sport, less than 50 miles, and I think I have a steering problem.

Most noticeable upon completing an intersection turn (~90 degrees), the steering wheel, when released, does not return all the way to center and the amount that it does return is done so sluggishly.

I've never encountered this in previous cars of mine, BMW and Saab, and am concerned. Any talk of this here, is this common, any MB history???

Thanks, Richard