I have a 2003 A4 2.0 FSI. It has done 30000 miles. I have been told during my last service that I need to replace the belt timer (sic) at a cost of Ł900 and that if it goes the engine could seize. I have to do it as Audi only guarantee the part for 5 years. I am being given the truth hear or is the Audi Dealership trying to get me to pay for a repair I do not need! HELP!!!!