can anyone advise on my power steering problem i just got a new engine fitted to my CLK but which meant the power steering pump had to be disconnected. now i cant get my car back cause when reconnected the power steering is making a buzzing noise which gets worst as you rotate the wheel from left to right. the resiviour keeps filling with bubbles.

does this mean i need a new pump?

could i use a pump off the same year 'C' class??

thanks