On average, the 2008 Audi S5 starts to “feel” problems with the POWER TRAIN and its various aspects after 60 000 miles.
Recently reported POWER TRAIN problems on 2008 Audi S5
While driving at any speeds the manual transmission syncos wear out prematurely causing grinding into gears and failure to engage gears wich can cause stalls or sudden loss of speed. iv been told its a very common problem among these vehicles.