Hi all can anyone help me i have a problem with my standard golf stereo the volume control is playing up when i try to turn it up or down sometimes it works and sometimes it doesnt but to get it to work even slightly you have to turn it really gently one click at a time and quite often even tho im turning volume up it turns the volume down is this common and is there an easy fix i know i could get another better stereo but am fed up with keep taking the pop off front off and putting it back on so want to stay standard (for the mo). also im getting wheel vibration at around 70 mph i thought i may have a buckle or a wheel thats not balanced properly but iv just put a brand new set of wheels on and its still doin it is it likely to be a wishbone bush? any help would be great and thanks in advance

sorry its a 99 golf gti turbo by the way