Hello, welcome. My name is Mike, I will do my very best toassist you with your question.From what you are describing this is a failure of the steering gear which works with the power steering pump.The steering gear is known to fail on this vehicle and is easily confused with a power steering pump failure.
Dear Mike, some of my friends mechanics suggested that it may be a electrical problem referring to a sensor located at the steering wheel because the steering gear never cause a problem before or a interrupted cable somewhere... Thanks!
Dear Mike, me again... will a steering rack removed from a A class compatible with my car?