c200 avantgarde

The workshop is asking me to change the whole steering rack which is very expensive and not justified so just checking if anyone knew what this sound is about. Thanks

Hi. I am brand new to this forum however i have owned my merc for aprox 3 years. Last week i got the oil sensor faulty message on my dash and the car began to enter limp mode. Then later that day it dissapeared. Then it came back. So i changed the sensor...£100 plus vat none the less...