According to news reports on the radio, some Audi A1 and A3 models are affected, although they're not mentioned in the on-line report. Apparently, one of the issues is the gearbox oil in DSG boxes.
According to VOSA the recall is on S6, S7, RS6 and RS7 built between Jan 12 and Aug 13: CONCERN: FUEL LINE MAY HAVE BECOME DAMAGE AND COULD CAUSE A FUEL LEAK