Steering Help for 300E
 

Hello, I am new to forums. I have a 1991 300E. I have noticed recently that the steering is able to achieve full 'lock' on the right side, with about 2 1/4 revolutions of the steering wheel. However on the left side, the steering only turns about 1 1/2 revolutions. I am not able to get get a full "lock" on the left hand turn.There is no play or noise in the steering.
Can any one offer an explanation as to what could have gone wrong and a possible fix. Thanks