I think a reasonable expectation - and one in line with public information from Audi known to me anyway - is that A5 will only replace the two-door A4 variants, namely the A4 cabrio replaced by A5 cabrio. A5 might also get its own 4-door version in the A5 Sportback, but that is still a different car from an A4 sedan/limousine due to the design/price-point/less practical considerations.
Other than that, A4 will of course continue alongside the A5. A6 will also get its coupe variant, A7, (or will that be more of a coupe variant of A8?) which will feature four doors instead of two (much like Mercedes Benz CLS).
Other than that, A4 will of course continue alongside the A5. A6 will also get its coupe variant, A7, (or will that be more of a coupe variant of A8?) which will feature four doors instead of two (much like Mercedes Benz CLS).
