hi folks my wifes a 140 avantgarde has develpoed a really annoying sqealing sound when driven for about 2 miles,its coming from the front end,and sounds like brakes.it comes and goes one minute you can drive for 25 miles then get a mile from home then it starts! grr.what size sockets allen keys do i need to remove the pads so i can reface them and copper grease them up this should nail it i hope .cheers