Brakesystem 'strange sound'
I have a 155 1.7TS E2 and whenever I touch the brakes there is a sound that sounds like squeezing a mouse. I think it is coming from the big round metal box in the motorcompartiment at drivers side. There normally is a membrane in this box and my guess is that it is leaking air!
When I hit the brakes gently my car pulls to the left, but when I hit it hard, it goes straight as it should.
Does anyone have any idea if I should replace the box? or only the break cilinder that is mounted on this box?