Charade 2004 Auto. Brakes and In car Shaking

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Hi I have a few issues i believe are unrelated. The First issue is when i am pulling away and releasing the brake or coming to a standstill there is a loud sound as the break is release or pressed. could describe it as a short sharp grinding sound. I have had the caliper replaced and new pads fitted which made no difference. My second issue is that when stopped with the car in D i can feel the vibration from the engine, this is worse when things like air con are turned on, also when stopping at a junction there is a short vibration before the car stops. If anyone has any ideas or has seen these issues before then please help. Thanks