In June Liverpool Volkswagen (Derby Road, Liverpool) carried out what it described as a '2nd variable service' on my 4-year-old VW Golf. I was charged nearly £300, which included the service charge (£156) plus filters, oil, plugs etc (£104) and VAT (£39). No mention was made of any deterioration or wear and tear to any significant parts of the car. Two months later I took the car back for its MOT. Shortly afterwards a received a telephone call at work to tell me that the front pads and discs were worn down, while those on the rear were heavily corroded. I therefore gave authority for the work to be carried out. When I collected the car I asked why the pad and disk problems had not been spotted during the service only 2 months earlier and was told that only a visual check is carried out during a service. When I got home I checked the handbook and found the statement that during an interval service the brake pad thickness front and rear is checked. While I accept that pads and discs can wear down and move from being acceptable to unacceptable over a couple of months, am I being naive to think that it is unlikely that they could move from being acceptable to heavily corroded in that same period?