Hi guys,I've got a 2006 X Type 2.0d. I've had a continuous issue with the brakes making a sort of loud 'honking' noise when I brake, coming from the back. Recently it has been a bit more continuous when reversing.However yesterday I found that my brake pedal would be hard to push down when driving and rock solid when stopped. After a while it'll go back down, but after braking 3-4 times it'll be rock solid again. It got worse today and then my engine management light came on earlier. Also, when the engine is off it'll be rock solid, then if I push my foot down hard on the pedal and start the engine, it doesn't go down at all.I'm presuming its a servo issue, but does anyone else have an idea before I take it to a garage? Thanks!