After the initial scandal when VW dealers were asking £1,800 - £2,000 to fix this on cars just out of the 3 year warranty, VW was eventually shamed into applying a fix developed by www.ecutesting.com/ but stopped doing this FoC in August 2015. For a 55 reg, now more than 10 years old, best to get your VW specialist to send the module to ECU testing to get it fixed. Cost you a total of about £500.