Hi there My Benz has developed a noise when braking – when I apply the pedal I hear a brief squeaking noise emanating from somewhere around the back axle/diff. It doesn’t seem to affect braking and the car stops as you would expect, without veering off to a side. The brakes on my SL500 are hydraulic with all round calipers. The noise only lasts a split second when applying the pedal and doesn’t continue whilst under braking, this leads me to think it’s a hydraulic issue when first applying pressure? Can anyone help? Thanks Should have said, no warning lights or error messages are showing!