Steering Wheel Turns 360 degrees

[lsmalley]

1990 190E 2.6

I noticed recently while making a turn from the street into my parking lot, the sterring wheel turned 180+ degrees. alignment is fine and steering is not wobbly or anything, but I just recently noticed that the wheel would make a full 360 degree turn sometimes if the turn was sharp (90 or less degree). driving is otherwise normal, curved roads are normal as well as the wheel only needs to be turned slightly to left or right to get the car to go in the dirction of the curve. Anyone have any idea on how to fix this?