North American customers will have to wait a little longer to get their hands on the soft-top version of Audi of America Inc.'s red-hot TT coupe.

The TT roadster was slated to join the front- and all-wheel drive coupe versions of the low-slung sports car this fall. But Audi of America says demand for the fixed-roof TT has remained so strong that the Gyor, Hungary, assembly plant continues running flat-out to fill orders. Demand has been particularly strong in Europe, where waiting lists for the TT stretch to more than a year.

In the U.S., Audi has sold 2,801 TTs since introduction in May. “We elected to postpone it,” says one Audi official of the TT roadster's North American launch. “We'll have it on sale in April to hit the spring selling season. Besides, why shoot all of your guns at once?”

The North American debut of the all-wheel-drive (quattro) TT coupe remains on schedule for this fall, Audi says.

Meanwhile, the TT has been hit with a recall affecting 46 of the cars sold in the U.S. Fuel lines in some of those cars may be crimped, causing fuel to leak. Audi of America says it discovered the problem in a test fleet car. Only cars built early in the production run are affected. Fuel lines will be replaced in the 46 cars.