The line expansion at Audi marches on toward an inevitable crowded house by the end of the decade. According to spies for World Car Fans, Audi's planning to add an A7 four-door "coupe" to its odd-numbered mix by 2009. You'd hardly tell from this test mule, but the model will reportedly compete with the Mercedes CLS — and a new entry from Jaguar — in the new segment of sedans whose low door jambs are most likely to split a passenger's head on entry.
