Hello peeps.my 1.6 a3 8L has annoying fault.the radio is on and when im driving it is like its missing bits out like i am out of range but im not.the cd works fine.its doing my head in.i had rust on the aerial mount which ive cleaned off with a wire brush but it hasnt made a difference.thinking of aftermarket now but dont realyy want to i want to keep it original.can anyine help???thanks.